FYI - Batman demo to download with PhysX...

[Final8ty]

The best thing Nvidia can do for PhysX is let the advanced effects run on the CPU. It would reduce the amount of whining and it would let people directly see the performance improvements they claim to achieve with GPU acceleration. A lot of non-Nvidia users hate PhysX simply because they are completely blocked from accessing those effects. It would be wiser to let them run it slowly and maybe hook a few more people like that instead of generating all this bitterness.

It would likely increase sales for them.
But they will still have to live with that people will think the CPU path is deliberately performance crippled because of what they have seen with Havok.