We recently caught up with Respawn at Titanfall events in both LA and London and had the opportunity to try out the beta.
When asked what the native resolution of Titanfall Beta is/will be on the Xbox One, Abbie Heppe, Community Manager at Respawn confirmed the Titanfall Beta runs at native ’792p’ resolution, an increase from the previously rumoured 720p.
Abbie went on to say that the resolution will increase as the team edge closer towards a final build of Titanfall, and could potentially be in the region of 900p native resolution once complete.
To clarify, whilst 792p is not a “standard” resolution as many would come to expect, the vast majority of games run at odd resolutions and are then upscaled. In this instance, 792p would be upscaled to 1080p depending on the output settings of the console.
via Titanfall Blog
I assume it's 1408x792 pixel precisely, as that would be true to the 16:9 aspect ratio.
On the topic of fps: