Apple restricts iOS 10 to iPhone 5, 4th-gen iPad or newer [u]
Following a debut onstage at WWDC 2016, Apple seeded the first beta version of iOS 10 to developers on Monday with support limited to iPhones, iPads and iPod touch models powered by the company's A6 system-on-chip and better.

As noted at the bottom of Apple's iOS 10 preview website, the upcoming mobile operating system is compatible only with newer devices, leaving legacy models like the iPhone 4S and original iPad stuck with older iOS versions. Specifically, hardware powered by A6 chips the new minimum requirement set by iOS 10.
According to Apple, iOS 10 will run on:
iPhone
iPad
iPod
Unlike other platforms, Apple's iOS offers reasonably deep compatibility with older hardware. However, as the mobile OS bakes in advanced features its performance standard rises, meaning legacy devices will inevitably fall short. For iOS 10, Apple has set the cutoff at the A6 SoC.
The first iOS 10 beta was issued today, months ahead of public release this fall.
Update: Apple on Tuesday modified the iOS 10 compatibility list, raising hardware requirements to A6 SoCs and higher.

As noted at the bottom of Apple's iOS 10 preview website, the upcoming mobile operating system is compatible only with newer devices, leaving legacy models like the iPhone 4S and original iPad stuck with older iOS versions. Specifically, hardware powered by A6 chips the new minimum requirement set by iOS 10.
According to Apple, iOS 10 will run on:
iPhone
- iPhone 6s & 6s Plus
- iPhone 6 & 6 Plus
- iPhone SE
- iPhone 5s
- iPhone 5c
- iPhone 5
iPad
- iPad Pro 12.9-inch
- iPad Pro 9.7-inch
- iPad Air 2
- iPad Air
- iPad 4th generation
- iPad mini 4
- iPad mini 3
- iPad mini 2
iPod
- iPod touch 6th generation
Unlike other platforms, Apple's iOS offers reasonably deep compatibility with older hardware. However, as the mobile OS bakes in advanced features its performance standard rises, meaning legacy devices will inevitably fall short. For iOS 10, Apple has set the cutoff at the A6 SoC.
The first iOS 10 beta was issued today, months ahead of public release this fall.
Update: Apple on Tuesday modified the iOS 10 compatibility list, raising hardware requirements to A6 SoCs and higher.
Comments
They could have been specifically referring to the beta. It would be tuned more for release, so perhaps that is why the website indicates it is coming for iPad 2 and iPad mini.
The website, where they copied the info from, says it is.
The A5X is much better in performance.
iPads are literally everywhere, there is even a app that turns them into a time clock for large factories.
That aside, it's a real credit to Apple that so many devices are still upgradable to the latest OS versions. Those “Apple engages in planned obsolescence” types are out of their minds.
I still have a 3 here, and while for some things, it's slower, usually concerning graphics, in other things it's slightly faster. It depends on whether what you're doing is graphics or computation oriented.
for example, if I make a 3D model in AutoCad 360, and run it on an iPad 2, which I can barely do, and run it on a 3, it computes the figure faster on the 3, but shows a slight speed up when rotating it on the 2. That's because Apple uses the GPU for computation, which adds to the speed. But when rotating it, the higher resolution of the figure slows it down somewhat, because the A5X's GPU isn't 100% equal to the higher resolution, so rotating it is slower. I'm not just guessing. I've done it.
I also have the iPad 3 (my wife as the iPad 2). The 3 is extremely slow, unless you disable almost everything (which I have). Once you're in an app, it generally works well if it's compatible (Safari aside) but switching between apps is very slow. The primary reason for that is the speed of the storage, so flushing things out of memory and reloading the new app takes a long time, because the I/O is very slow by today's standards (about 5% of the speed of an iPad Air 2). It's so bad in some cases that if you play a large movie (day 5 - 6GB is size) it will stutter in certain places as it moved from solid storage to RAM and then back to storage, especially if you have not downloaded it fully.
The biggest reason the performance is better than the iPad 2 is not because of the A5X, it's simply because it has 1GB of RAM rather than 512MBs which helps a little.
I'm really surprised they kept supporting the iPad 3, but the performance has been terrible since iOS8 so I'm not banking on it getting any better.