About Pixel Shader 3.0, currently an "nVidia only" kinda deal, there IS an improvement and a NOTICEABLE one at that (i was argueing with my friend, an ATI fan until he showed me otherwise). To be honest if there is an improvement on graphical quality, it's wasted on me as both Pixel Shader 2.0 and 3.0 look fabulous. The difference however is that the 6800-series perform shockingly better when making use of Pixel Shader 3.0 (i was expecting a frame here or there but there were some very significant improvements). A very interesting time for game developers!