After watching the walkthrough with developer commentary, I wasn't all that interested in the game. I think part of that is because I did have the commentary there, kinda looking over my shoulder and taking me out of the game the whole time.
This new trailer, however, has totally sold me. It brings in the moral choices in a way I can identify with, and it does a much better job of showing off the setting and the decrepit feel of the whole place.
I hope the xbox 360 effects can be rivaled on the PC, because the art and setting are going to be the clincher, I think, similar to what Kolba said.
Jam it back in, in the dark.