I was content to leave this game alone, but after watching MATN play the demo, I'm definitely intrigued. I adore Bioshock and this looks close enough to be a spirtual successor. It all depends on the narrative and story, though. Everyone expects a twist at this point. If it espouses a heavy philisophical commentary, then I'll definitely play it. Though it'll be hard to tell if it does without encountering spoilers...hm. I'll keep myself on a Prey blackout until it's about $30.
Just watching some Streams of this right now...I think I'm with Legion here...I wanted to see enough of it to verify I'll dig it (which I do) and wait for a price drop. It really looks nice...very slick. Lots of mod options and replay-ability for sure. I can't quite say it's character "build"y, but at least there are different styles for sure.