apparently its as a runtime sdk only - baked inside the game/engine and it doesn't need physx driver for it.. Not 100% sure though. Normal physx driver supports only old crippled code up to 2.8.4..

Yes PhysX 3 uses local runtimes or what it's called, I don't know if the core driver files are needed for the latest games but it's needed for some of the early PhysX 3.x games I believe. 🙂 (Then the driver seems to also have some game specific .dll files or what those oddly named folders are for.) EDIT: PhysX 2.8.4 can use SSE2 though from what I remember, some CPU optimization is also available in 2.8.3 though neither are as good as 3.x although all are of course slower than GPU acceleration.

I think there couple of games that have it in already, I think more should have it, that way they can do better effects with it and hopefully effect game-play, instead of just for looks. There times where I wish AI in warframe would actually go flying out the window, when it broken in a space ship or station.