Helps with the immersion when playing a game does physx and when you spend the big bucks on a card I expect some sweet GFX/effects. After playing mafia 2 with it on and with great performance I'm not going to knock it as much as I did.
You're missing the point, not using physx can give you the same effects without the performance hit anyway, physx is purposefully, utterly crap, to persuade people to buy physx. The only difference between it, and other physx engines, is other ones aren't artificially borked on purpose.
Physx is lame, and a few bits of crap on the ground doesn't improve immersion, if the effects themselves are a step back in terms of realism, I shoot a window, the glass shatters in the wrong direction and the pieces stay behind after, all that does is leave a reminder of how the effects are less realistic than effects from games 4 years ago that can get the simple things right.
Fact is game runs great without physx, runs like a turd on the cpu because its purposefully NOT accelerated on the cpu using the slowest possible method to run it, and the result, is meh at best.
I'll happily be running the game with it off, then I probably won't have to deal with dissappearing glass and delayed unrealistic glass explosion effects, that honestly, are a joke.
If someone offered me, a tree that grows women who love to please men, and my garden gets full of them, I wouldn't take it if all the women were complete munters.
Therein lies the problem with physx, the idea is nice, but the debrie and effects you get, are crap, more crap stuff doesn't equal anything remotely good.
Lets not forget, again, NOTHING shown in the game is new, nothing is hard to create, Nvidia have PAID the dev's to most likely have their own team come in and essentially badly code some debrie effects, that anyone else could have done with any other engine, and then caused you to drop performance to use it. If you think thats a good thing, you're mental, theres two people in the world that will tell you these are brand new, ultra advanced, "night and day difference" effects, Nvidia, and Rroff, most other people are sane, can see the video's and see how unrealistic, how completely inaccurate, and how completely not remotely new these effects are.