Twitter | Aaron Greenberg
900p (1600 x 900) upscaled to 1080p (1920 x 1080).
Confirmed now is Forza 5 at 1080p/60fps, Ryse at 900p/30fps, Killer Instinct at 720p/60fps and unconfirmed is Dead Rising supposedly having a dynamic resolution at 30fps.
Clarification of resolutions.
720p | 1280 x 720 | 921,600 pixels
900p | 1600 x 900 | 1,440,000 pixels - 56% more pixels than 720p
1080p | 1920 x 1080 | 2,073,600 pixels - 125% more pixels than 720p, 44% more pixels than 900p
For kicks.
1080-900=180
Xbox 180 confirm.