There's actually a promo trailer with what appear to be cutscenes... from Duke Nukem Forever.|
Wired's blog also has some analysis.
Chris: Going into this announcement, Broussard and co. had a lot of splainin' to do if they were going to convince people that they were actually anywhere close to shipping this product at all. Having seen the trailer, they're still where they were yesterday. A video and a Duke one-liner does not a game make; if it did, Duke Nukem Forever would have already shipped five times by now.Remember - originally, DNF was supposed to beat the ill-fated (and way too long delayed) Daikatana to market. 10 years later...
I don't know why these people don't get it -- releasing a teaser trailer full of CG sequences that may or may not be from your final product simply isn't in their best interest right now, as it just compounds the problem of them generating hype for a game that is miles from being a final product.