Plus the stuff the devs are spouting over at the PS Blog about how much of an impact you'll have on the narrative.
On the one hand...
"Choice is a central tenet of Until Dawn. Your actions not only determine who lives or dies, but will also directly influence the relationships between the characters (romantic or otherwise). You will even influence how characters react to each other. If you are mean to a friend, they may or may not choose to save you later in the game. The narrative will always continue forward, adapting to your decisions throughout the game – meaning that your game will be noticeably different from anyone else’s."...sounds awesome. On the other hand I've heard that shit before.