So what would games like the new NASCAR and Just Cause 2 really fall under since they use GPU acceleration to do some particle effects and water physics?
Custom CUDA-based solutions are very rare, so no labels for them yet.
Also you think that NVIDIA the new visual FX by gameworks will start phasing out physx as we know it?
PhysX SDK is a popular middleware product, which NV sells for money, so it can't be "phased out".
However, as standart GPU PhysX effects like particles and cloth are becoming common is games for new consoles (look at Lords of the Fallen), NV will invent more and more advanced tech to burden your GPU with (FLEX, smoke and flame sim, etc).