I really can't see physics cards making it mainstream.
They said the same about 3DFX graphics accelerators at the time. Sure, you can probably do everything soon with GPU - and then we are again in the situation where EVERYTHING is done by GPU (like previously by CPU)... and slow because GPU has too much to do.
What he said. Sure. As CPUs and GPUs get faster they can do more things - and providing that gameplay doesn't evolve, then sure. It's not like games NEED flashier graphics or a decent AI. Poor Dynamics Simulations are much more important. No need to improve on that. I mean just design a game like DOOM3 and people will think all of your dynamics glitches were done intentionally to make the game more scary. So using Ageia PhysX SDK means your game is automatically compatible with: Single core users, Multi core users, and PhysX card users.
Well. Imagine that. Nobody minds extra processing power, it's just that hardware dedicated to physics only seems kind of wasteful.
Where as more polygons in Lara Crofts chest area is a worth while cause! We don't need to see them bounce around realistically as well! I mean it would be impossible to focus on the "game" as it were.