iMacs are designed using mobile technology to provide tidy all in one home and SOHO client users, similarly laptops are for the man/woman in a suitcase transportable client use, and tablets have more recently come along to fulfil the anywhere viewer case sinario akin to large touchy smartphones, all supplying the end user with endless hours of App sapped engaged interaction with the online experience.
Imacs and even laptops can facilitate a considerable amount of daily professional use but when it comes to producing professional creative works they all have severe limitations by virtue of the level of technology employed inside them that even includes TB and no amount of fooling yourself is going to change that, they are what they are and however elegant only fulfil the purpose and limitation of their design as a client using the existing architectural infrastructure software available at the time and at the right price.
When it comes to Professional computers the requirements are driven forward by advancement in technology and programming to fulfil creative endeavour and this pushes the frontiers of advancement of which to date Apple had an elegant significant lead in.
However times change and even the great Intel dispite its latest offering the new high-end Sandy Bridge-E 3960X is now looking down the barrel of a shotgun simply because its inherited antiquated '86 beomoth of a dinosaur technology and is facing meltdown as it pushes closer to the increasing cost limitations of furthering its floored design and Ivy bridge may well be its nemesis.
Put simply its CISC architecture is too complicated to negotiate change and even AMD can't bulldoze its way out of that one.
Acorn RISC Machines (StrongARM) aka Advanced RISC Machines aka ARM have been designing processors for decades and licence 95% of the mobile phone and TV Video and settopbox industrtries now they are growing up and developing workstation class high efficiency quad hexa and octo core parralel computing RISC processors ARMv8 A15 64bit that will soon by 2012 start to challenge the whole '86 computer industry as they first move into the Laptop market and already the server market and now the traditionally Zeon held professional workstation market.
I personally think Intel would do well to reserect its Xscale ARM holding taking advantage its 3D-trigate production development technology and produce the next generation of 64bit multicore ARM RISC Processors thinking vertically rather than laterally..
Since Intel had a falling out with nVidea Apple made the mistake of following suit not one of the best of Steve Jobs decisions now nVidea have integrated Tegra3 multicore ARM SOC CPUs with their Quadro/Gforce GPUs to produce the next generation of advanced Maximus multicore powered 3D graphics workstations just announced.
as you can see ARM multicore processors will way outstrip even Nahelem Ivybridge '86 processors and ontop of HP( the worlds biggest producer of computers) using ARM cores in their next generation server farms, these guys don't do stupid btw!
If Apple has visions of continuing their loss leader flagship MacPro workstation they must adopt muticore ARM processor scalability across their entire range because when Microsoft pull out their very nicely shaping up Windows8 scalable for up to 190 ARMcored computers from ARMSOCs for Phones to Tablets to desktop systems, right up to ARM/GPU workstations and the Server market then Apple will have lost the battle.
Perhaps Apple forsaw the ARM/ '86 war coming and decided to opt out, I wouldn't blame themit would mean developing a whole new pro machine design and re-writing MacOS for ARM and porting apps again, but I would have proffered them to have taken up the gauntlet and been a pioneer its not as if they couldn't afford it, maybe they might??? maybe they would have but Steve Jobbs isn't at the helm anymore.
next year 2012 will be the next computer industry generational shift year to watch.
btw, I am an independent engineer and don't work for these guys also had a soft spot for my studio MacPro for many years so would like to see a combined profesional iOS/MacOS succeed a while longer.
If you wonder what Professionals do with such workstations check this out http://www.nvidia.com/object/wetadigital_avatar.html