This optics of all this look wrong.
My theory is that Apple has a tendency (because they are perfectionists) of painting themselves into a corner. It is possible that this is what happened here.
Firstly their is the whole advent of the iPhone/IOS phenomenon which draws a lot of the company's energy, just to keep in the game against the competition.
Where Apple may have blundered, regarding the Mac Pro, is with Thunderbolt (Lightpeak). Specifically what tripped them up may have been the Thunderbolt display. In eagerness to impress they released this display in a way that the graphics were dependent exclusively on Thunderbolt. This was fine for their laptops/iMac/MacMini but was problematic for the pro desktop which traditionally use graphics cards and expansion slots.
Apple didn't think through properly how the Thunderbolt display was going to connect to the one mac where it was the most important (for them), the Mac Pro, the one Mac Apple really likes us to purchase with their quality though expensive screen. If Apple thought that the vendors of graphics cards would release thunderbolt enabled cards we must then we must assume that Apple are naive.
Apple have themselves in a knot of a design quandary due to the way that they are so specific on the way a Mac is designed and looks. Don't get me wrong the Thunderbolt display is a great idea but Apple could have perhaps either implemented and released the screen at a later date or in a different guise.
The options could have been:
Release Thunderbolt Display as is, when top end Mac is released with new type of Thunderbolt enabled graphics card in 201x, whenever such a thing happened.
Release the Thunderbolt Display when they did but in a way that the Mac Pro would connect using conventional display port. How this would be implemented I am not sure. Some kind of adaptor? Extra cable: thunderbolt on Mac Pro to thunderbolt in on display? Who knows, but again, because of the way that Apple is specific about perfect design they have given themselves little room to manoeuvre.
What is sad about all this is that Apple does not have Thunderbolt in its top of the range Mac, the one place where you would expect it. A technology that will mostly only be used by pros initially. But also as a consequence of this design bottle neck the top of the range Mac does not have USB 3 and is using cpus that are two years old. What a faux pas!
I think we can all agree that if Apple had road mapped their design approach, whereby the Mac Pro continued in its current form factor (albeit with the latest Xeons, USB 3, Thunderbolt and whatever are the best in current graphic cards), and then, lets say next year, replaced it with something more radical, they would have held on to some kudos amongst the pros.
Then again maybe I am completely wrong. Maybe Apple doesn't care or are at a point where they feel that they cannot compete in this area. Whatever the reason they are alienating professionals who want to work on Mac and in the long run this can't be good.