Earlier this month, Digital Foundry confirmed that the Xbox One version runs in 900p:
As played at this year's Gamescom and EGX on Xbox One, multiplayer in Advanced Warfare is a very different beast to the work-in-progress Seoul campaign mission shown at Microsoft's E3 event.
Running at a native 1600x900 at both events (a boost from the E3-era 882p), little has changed to Xbox One's rendering setup for multiplayer, suggesting this number is a lock for all modes in the final release.
Opaque panels now line the screen's edges, showing the map, bullet counter and target points - rendered in the same pass as the actual gameplay. To our pixel count, these element are upscaled from the same 900p base resolution as the core gunplay - a mix-up for a series which, until now, delivered HUDs at the highest resolution possible, independent of the 3D rendering side.
Meanwhile, a NeoGAF member recently posted a direct feed image of the PS4 version, which was then confirmed to be 1080p native. Of course, the Xbox One version could get a day one update that would increase the resolution, but with the game's release only four days away, I have to think that we would have heard that announcement by now.