The new design of the Mac Pro is absolutely ASTONISHING!!! The build, the power, the, the, the... everything. But there is one more thing
... thad budders me badly. I'v been working in CGi industry for many years. As a pro artist I need (and not just me) one special requirement from a computer in general and that is nvidia GPU.
Premiere mostly uses CUDA, After Effects is CUDA, Nuke (there is no compositing software like nuke right now) is CUDA, iray in 3D Max, Catia, Bunkspeed and Cinema 4D is CUDA, RTT DeltaGen is CUDA, Octane Render is CUDA, Arion Render is CUDA, 3D Coat have CUDA Voxel Sculpting, Maya, 3D Max and Softimage uses Physx, etc.
There is one software that uses both CUDA and OpenCL and that is Vray. Well OpenCL version of Vray works terryble bad on GCN architecture (because AMD is so good in OpenCL...). It crashes when you load a bit more complex scene and the performance is not that good. Also on OpenCL it takes longer to load scenes in vram than CUDA.
I don't believe in synthetic benchmarks like luxrender and other OpenCL crap stuff. Believe me absolutely nobody uses Luxrender and other useless OpenCL benches in production. So some good results with AMD GPUs on those useless apps are totally irrelevant. On real world 3D pro apps nvidia is far more better.
Kepler is a better architecture for GPGPU also better geometric power inside 3D OpenGL and DirectX viewports for DCC and CAD apps, better drivers, better frame rates and frame times, better technologies like TXAA, 3D stereo, v-sync, 4k rez, ECC mens, larger software support, more energy efficient and so on.
Mainly the new Mac Pro is build more for Final Cut Pro & Motion and there OpenCL standards which is way too little in both CGI and mechanical/industrial CAD industries.
PS: Seriously do you really need dual GPU for Final Cut?
Tooooo bad... really too bad
. The new Mac Pro could be a great success if it also have nvidia Quadro option.