Well, I think the greater issue is that ATI and Nvidia haven't even standardized their GPU computer architecture. ATI is backing OpenCL, and Nvida backs CUDA.
Ageia PhysX was acquired by Nvidia, and they use the API to drive some physics on their GPUs. It's not really designed for the type of physics that flight sims would use.
I've been pondering this for a while now, but would this be possible? From what I've seen, it's possible for GPUs to use APIs like PhysX to do calculations that would otherwise be saddled on the CPU. So would it be possible for GPUs to take some of the load off of CPUs?
It would basically require huge amounts of very very good LODs, I mean for everything.
Or DX11 to go from flight sim levels of detail to quickly tessellate to FPS levels of detail.
I'm wondering if anyone knows how the AH-64A designates a target from itself. No, I'm not asking how the Hellfire finds the way, I'm asking how the AH-64A CP/G can lock up, say, tanks, or just a patch of ground.