What I don't understand is why people were MORE interested in this as a first-person shooter. We already have plenty enough quality FPS games and it's pretty hard for games to distinguish themselves nowadays. Personally I'm more interested in it as a third-person shooter. If they can get a Mafia II style vibe with an alien twist then that sounds good to me.
That said, I really want to see some gameplay walkthroughs before I even consider this. I loved XCOM:EU but despite the decent trailer I haven't seen anything to warrant any confidence in it. Bioshock 2 was a pretty weak game and this title has already been significantly delayed. It would be nice if this were a decent game.