Just played the demo… you can force 1080p on it by disabling 720p and 1080i. The game running in 1080p is stunning, it doesn’t do the ugly blockiness in some games when 1080p is forced (like dead space). Anyways, when playing the demo here is a few suggestions.
Change the controls:
I’m playing the game on Alternate Controls 2 and changed zoom to hold. This is basically the Call of Duty 4 controls with sprint and melee mapped to L3 and R3 (Stick Click).
Believe the hype, and you must play the game with surround sound. It’s as impressive audio wise and it is visually (7.1 Supported)