BioShock

I downloaded the demo for BioShock on Xbox 360 last night and I was very impressed. If you have an Xbox 360 and an Xbox Live account I recommend downloading it right now. It isn't a very long demo, but what you get is a nice look at the potential this game has. The graphics alone on the game are amazing, especially the water effects which are by far the most realistic I have seen to date. Expect to hear more about BioShock soon.