Holy fuck. I figured since it's Friday and I have no homework due until next week, I'd give this a try. I played through it with graphics on high (I think you need Vista/DX10 to run it on ultra high) and 1280x1024 resolution (didn't have any lag problems, but the shadow rendering acted a little funny).
It looks absolutely phenomenal. The graphics are the best I've seen (which I suppose doesn't say much since I don't really play video games much), the game play is fantastic and the story line looks extremely promising. I don't know if I'll buy it since I'm so busy this semester, but it looks fantastic.