Brian Horton, Game Director for Rise of the Tomb Raider, has confirmed on twitter that the E3 2015 demo was running at 1080p on the Xbox One. Following a preview and technical analysis video from YouTuber NC Gamer, Brian Horton responded with the tweet below:

　　Nice analysis from NC Gamer, Rise of the Tomb Raider footage he previewed is 1080p from an Xbox1http://t.co/hDaS5HlxGb via @youtube

　　— Brian Horton (@BrianHortonArt) July 19, 2015

　　NC Gamer updated his video with the following clarification:

　　I made a very silly and inaccurate assumption on the games resolution based on Developer interviews. I always check my information but i rushed this article up from outside the UK with that assumption. It was incorrect and the game developer has quite rightly corrected me on being an idiot. I have amended the video with that piece out and link here the resolution confirmation from Brian Horton

　　https://twitter.com/BrianHortonArt/st...

　　I apologize for the confusion caused and can assure you I will learn from this foolish mistake and only stick to facts I can confirm or prove as I have done and should always do.

　　With Lara now set up as the full on Female Indiana Jones we know her to be. Her latest "exclusive" game is all set to go harder and faster and build upon the impressive 2013 Reboot.

　　With only a few months until release learn about the new gameplay mechanics, visual improvements and more that Crystal Dynamics and Square Enix are bringing to the XboxOne (& a 360 version) in 2015.

Rise of the Tomb Raider E3 demo was running on the Xbox One at 1080p

　　This time around she is more prepared and better equipped, to face bigger challenges and explore larger tombs with much more puzzle solving and platforming action. The environment of Siberia will offer more extreme conditions for Lara to adapt to, and her new equipment will come in great use when facing avalanches and climbing dangerous icy peaks.

　　Square Enix and Crystal Dynamics demonstrated the first gameplay of Rise of the Tomb Raider. The game looks absolutely stunning, especially with the impressive Siberia setting's weather and environmental effects taking center stage.

　　Rise of the Tomb Raider is scheduled to arrive in Winter 2015 exclusively on Xbox platforms.