I just played it once at 720p and again at 1080i. I didn't bother to bust out my component cables to check 1080p but at 1080i the resolution defiantly isn't much different than 720p. Lots of edges lacking any AA so it's easy to see it isn't using a full 1080 framebuffer. Texture filtering is also really rough on many surfaces, it looks like the have the mipmap bias kicked way forward. There is also a bit of tearing at 720p, and a bit more at 1080i. Granted the game still looks nice and the gameplay rocks, but I am a bit disappointed as I was expecting better fedility fidelity from a souped up Xbox game, especially with all the claims of it rendering at 1080p.