Apple research continues on combining iPhone, iPad with MacBook-style accessory
Apple is still considering ways to make the iPhone and iPad work more closely with MacBooks, including a system where an iOS device is inserted into a MacBook shell as a display or as a replacement trackpad with a screen.

Granted on Tuesday by the U.S. Patent and Trademark Office, the simply-named "Electronic accessory device" patent suggests how an iPhone, iPad, or other device could be augmented into a MacBook-like device. Effectively a peripheral, the shell would require an iOS device to be inserted in order to function, effectively extending the smartphone or tablet's usability into the realm of notebooks.
AppleInsider previously reported on the initial application for this specific patent, which was filed with the USPTO on September 20, 2016.

The shell is intended to appear similar to a MacBook, complete with keyboard and aluminum enclosure, but with sections missing in order to accommodate a mobile device. For an iPhone, the trackpad area would be hollowed out for the device to be inserted, while the iPad version would eliminate the display, with the iPad itself becoming the "notebook" screen.
While the shell would have most of the hardware required to work as a notebook, including an extra GPU to drive the display, ports, and other internals alongside its external appearance, it would not be functional unless a host device was installed. The cavity sections would include connectors to provide power to the host device, most likely through an extra battery in the shell or by pass-through charging, as well as for it to communicate with the other components.
Not only would it act as a host, the iPhone or iPad would also work as a touch interface in its own right, with the iPhone behaving like a trackpad and the iPad becoming a MacBook's touchscreen.

Apple applies for many patents on a weekly basis, and its publication by the USPTO is not a guarantee that concepts described in filings will turn up in consumer devices.
So far, Apple has not moved down the road of combining its iOS and MacBook lines in this way, and there is no sign this being changed anytime soon. It is likely the company is keen on keeping the product lines separate, while those wishing to turn an iPad or iPad Pro into a notebook already have many keyboard accessories and cases on the market that can provide similar functionality, such as Apple's own Smart Keyboard lines.
Apple is not the only one to have investigated using a smartphone in conjunction with a notebook. At CES 2018, game peripherals producer Razer showed off Project Linda, a concept notebook that had a space for a Razer-branded Android smartphone to be inserted in the trackpad area, with the mobile device also acting as a host for the entire setup.

Granted on Tuesday by the U.S. Patent and Trademark Office, the simply-named "Electronic accessory device" patent suggests how an iPhone, iPad, or other device could be augmented into a MacBook-like device. Effectively a peripheral, the shell would require an iOS device to be inserted in order to function, effectively extending the smartphone or tablet's usability into the realm of notebooks.
AppleInsider previously reported on the initial application for this specific patent, which was filed with the USPTO on September 20, 2016.

The shell is intended to appear similar to a MacBook, complete with keyboard and aluminum enclosure, but with sections missing in order to accommodate a mobile device. For an iPhone, the trackpad area would be hollowed out for the device to be inserted, while the iPad version would eliminate the display, with the iPad itself becoming the "notebook" screen.
While the shell would have most of the hardware required to work as a notebook, including an extra GPU to drive the display, ports, and other internals alongside its external appearance, it would not be functional unless a host device was installed. The cavity sections would include connectors to provide power to the host device, most likely through an extra battery in the shell or by pass-through charging, as well as for it to communicate with the other components.
Not only would it act as a host, the iPhone or iPad would also work as a touch interface in its own right, with the iPhone behaving like a trackpad and the iPad becoming a MacBook's touchscreen.

Apple applies for many patents on a weekly basis, and its publication by the USPTO is not a guarantee that concepts described in filings will turn up in consumer devices.
So far, Apple has not moved down the road of combining its iOS and MacBook lines in this way, and there is no sign this being changed anytime soon. It is likely the company is keen on keeping the product lines separate, while those wishing to turn an iPad or iPad Pro into a notebook already have many keyboard accessories and cases on the market that can provide similar functionality, such as Apple's own Smart Keyboard lines.
Apple is not the only one to have investigated using a smartphone in conjunction with a notebook. At CES 2018, game peripherals producer Razer showed off Project Linda, a concept notebook that had a space for a Razer-branded Android smartphone to be inserted in the trackpad area, with the mobile device also acting as a host for the entire setup.
Comments
I would suggest the headless MacBook would be the ARMBook -- that is, MacOS running on an Apple Arm processor.
Remeber the Palm Foleo? They already tried this.
https://en.m.wikipedia.org/wiki/Palm_Foleo
I'm personally more interested in approaches that consider using an iPhone and/or iPad to act as additional processing, sensing, and user interaction elements when connected to a notebook/desktop through a high speed serial connection. This "additive" approach gets into the domain of system-of-systems, an architectural approach that has been extremely effective for military systems since the late 1950s. Recent advances in system-of-systems are now taking advantage of second order benefits like real time and historical sensor data fusion, something that is crucial to enriching and accelerating machine learning and AI.
In fact, Apple is already applying system-of-systems concepts in macOS 10.14 Mojave and iOS 12 with the iOS device acting as a camera for macOS apps. Tethering is another such example that's been around for a long time. Wifi calling is another. Several Apple Watch functions fall into this category. Taking it up a notch, why not allow a MacBook to offload some of its processing tasks to a connected iPad or iPhone that is otherwise idle? Why not use an iPad as a drawing surface for Mac apps? Why not allow all Apple devices in your home to operate as a whole home voice and video intercom system? Why not allow Face ID on your iPhone/iPad to unlock your Mac? It's all about aggregating the capabilities of multiple systems into a single (super) system for greater cumulative benefit and capability. This is all about providing additive capability to the super system without sacrificing the independent capabilities of the contributing systems. If the contributing system, e.g., your iPhone with Face ID, is not present the super system still works with its own organic capabilities. It's not easy and it's not cheap. All of the contributing systems usually need to be architected to know how to play well in the super system.
The concepts outlined in this article are the polar opposite: you're designing a system with a "hole" in it that depends on another system to provide its basic capability. It's "subtractive" rather than additive approach. However, this may still be a very good solution to certain problems, especially ones that involve limited resources such as physical space, weight limits, cost limits, energy consumption limits, etc.
Apple is clearly moving to the cloud, and wireless connectivity. And there’s nothing elegant about that concept of slapping a $1000 iPhone into a laptop shell only to be used as a trackpad. And it will still be running iOS which is a touch based UI, so it turns the smaller iPhone into a larger iPad? A wireless interface would be better for that, or even plug in a wired connection. And how would such a laptop shell accomodate 4 different iPhone sizes ... at least elegantly?
No, Apple simply won’t go this direction.
(google the innovator’s dilemma, Christensen)