Nib95 @ NeoGAF added the following infos:
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
Kinda disappointing. Whatabout Sony?
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SOURCE: http://nforush.net/forum/xbox-one-n...-nowhere-near-1080p-native-m$-upscales-games/ via NeoGAF