Exactly why many people, including alienware believe that microsoft should have released vista as x64 only, software would have been forced to catch up, and just about every cpu on the market is 64 bit right now anyways. I'm pretty sure that eventually microsoft will force its hand and dx10.1 will show up, its a shame nvidia caused assassins creed to lose dx10.1, that brought a good performance boost that ati users paid for when they bought the cards, not to mention dx10.1 offers more than just extra performance, it also affects the minimum image quality etc