I sas the full DF foundry article today (this thread) and I take my time to read all of them and for my surprise:
"Meanwhile the situation is more interesting on the Xbox One: the anti-aliasing solution remains unchanged, but we see the inclusion of what looks like a variable resolution framebuffer in some scenes, while some cut-scenes are rendered at a locked 900p, explaining the additional blur in some of our Xbox One screenshots."
Some vgchartzers noted yesterday some blurry image in the Xbone videos... the fact that's tuned out that the game was running some scenes at 900p upscaled to 1080p to maintain the 30fps.
I was surprise with this point because Square-Enix said both games runs at 1080p but it was not true... Xbone version runs at variable resolution from 900p to 1080p to maintain the framerate at 30fps.
Xbone will have issues with all games to reach 1080p (except sports games of course)?