I dunno. It looks faithful to the first BioShock... which is both a good thing and bad thing to me. Good in that, though I was disappointed in BS because I wanted a real "sequel" to the System Shock line and got something far easier, the game itself had a fair number of good qualities to it; bad in that... well, honestly, it looks like an expansion of the "dress up like a Big Daddy" section of the first game, with nothing terribly new (aside from going outside for a walk). I'm not getting a feel of evolution at all. Granted, this is simply a crammed-together experience, and it's never good to form hard opinions of a game from a nine-minute demo reel, but still.
Also, am I the only one who finds the Little Sisters to be the creepiest entites in the game?
Glowy yellow eyes at man height- "Euughhh, kinda creepy."
Glowy yellow eyes at 2 1/2 feet off the ground- "ARRAGHRAGHAGH GET THEE AWAY FROM ME SATAN"