Phil Hodgetts has an article on running Final Cut Pro 10.1 on the new Mac Pro and what he was able to play back, 5 Red R2D 4K streams at different scales positions and rotations without rendering.
Pretty amazing, though now I want to see what happens when Adobe re-writes premiere for Dual Graphics Card support and what it can do, and even better if they carry that over to PC, so we can see this on dual NVIDIA CUDA cards. I would love to see what Premiere Pro could do using 2 GTX TITANS instead of AMD FirePro cards which are slower than gaming cards (much like NVIDIAs QUADRO line). The nice thing about the MacPro is it seems Apple is charging the gaming price for it’s FirePro cards, so you are paying for the Radeon editions and getting the FirePro.
I know that Final Cut pro X has gotten much better, but I am still not sold on it. I gave my 2 weeks at the beginning and the mess that it made of the timeline really makes it seem not viable for commercial or direct response, nor for anything that needs an audio mixer, as it will take so much longer to mix something that isn’t set specifically for an audio mixer.
Maybe I am biased by Final Cut Pro X 10.1, but all the improvements have not changed the timeline.