I really do doubt that physics chips will ever become standard. It requires a whole new API standard for one thing, a large installed-base, and user interest--so far there are none of these things, and may never be. I dont doubt that physics and such will be improved, but as for specific hardware implementations, I dont think so for the near future--if ever.

No one is going to buy a special physics chip..the only way it can succeed is if its integrated with a video card, or on the motherboard.