the one with no plan of it are you actually Josh, sorry.
NVIDIA is writting a CUDA implementation of PhysX.
CUDA thought is not restricted to NVIDIA. NVIDIA will just not write the drivers for the others. But NVIDIA uses to AMD available tools for its compilation etc (DGB and and an opensource compiler tool) so the only thing ATI needs to do is write a PTX driver for their SM4 cards and they can support the GPU accelerated PhysX as well and I would bet with the known speedups of GPU driven maths (factor 10-100 of a single tesla over a 16 core supercomp), ATI will write one more sooner than later, as they will lose the bussines costumers which want to use the cards for more than graphics otherwise very soon which they can not afford.
I know that for sure, as a CUDA researcher from NVIDIA held a multi hour presentation today at our university and that was part of it.
NVIDIA is writting a CUDA implementation of PhysX.
CUDA thought is not restricted to NVIDIA. NVIDIA will just not write the drivers for the others. But NVIDIA uses to AMD available tools for its compilation etc (DGB and and an opensource compiler tool) so the only thing ATI needs to do is write a PTX driver for their SM4 cards and they can support the GPU accelerated PhysX as well and I would bet with the known speedups of GPU driven maths (factor 10-100 of a single tesla over a 16 core supercomp), ATI will write one more sooner than later, as they will lose the bussines costumers which want to use the cards for more than graphics otherwise very soon which they can not afford.
I know that for sure, as a CUDA researcher from NVIDIA held a multi hour presentation today at our university and that was part of it.