their hardware accelerator card was a total flop.

...and as far as i know currently the gpu only gets used to accelerate cloth and particles. you can't use gpu acceleration if gameplay depends on the physics since then you only could target your game to certain nvidia cards. physics also can behave differently on cpus and various gpus because of floating point precision issues and so on.

so i don't see the big advantage of hardware acceleration. it still will take a while until cuda and opencl are more mature and more suited for physics calculations and then all physics engines will also support gpus of course.