A little game by the name of Bioshock comes out tomorrow. Having played through the demo twice, I have to say it's pretty extraordinary. Yes, it's another Xbox 360 shooter, but it's quite more than that. The overall visual design is stunning, the vintage music and sound effects are by turns creepy and lovely, and it appears to tell a genuinely engaging and smart story (we'll see how well the full version makes good on this potential).
The reviews are pouring in now and it's clearly the critics' darling, currently averaging a score of 97. The PC demo was released a few hours ago, so you may want to check that out before deciding which version to buy.
Watch out for those Little Sisters.