http://beyond3d.com/showpost.php?p=1113344&postcount=3
Perfect Dark Zero = 1152x640 (no AA)
Project Gotham Racing 3 = 1024x600 (2xAA)
These were two major releases also. Forget just launch, even Halo 3, Halo 3: ODST and Halo Reach weren't 720p. Halo 4 was the first 720p Halo fps title of the gen.
Halo: Anniversary = 1152x720 (FXAA remake, no AA classic)
Halo 3 = 1152x640 (no AA)
Halo 3: ODST = 1152x640 (no AA)
Halo: Reach = 1152x720 (2xAA temporal)
Halo 4 = 1280x720 (post-AA)
Alan Wake = 960x544 (4xAA) <-- I still think Alan Wake is one of the more amazing looking Xbox 360 titles. Incredible lighting and solid visuals imo. A lot of people had no idea this game wasn't 720p either till it was revealed through pixel counting. Even Halo 3 had to be found out through pixel counting, although Halo 3 had some really bad IQ in places, I thought, so it was prob a matter of time.
I also think none of the COD releases were 720p either. Maybe COD2 at launch was, but I don't think the rest were. It would certainly be nice for the vast majority to be 1080p, but as long as the games look good and perform great, I don't think there'll be many complaints if they happen to be running at a lower resolution.