I'd hope in the remaining months they have to work on titan fall they can do better ( its no graphical showcase). As for Halo i'd imagine for better or for worse by the time that hits the resolutiongate will no longer be that much of an issue for the average
consumer (early adopters fuel for the fanboy wars aside).
I'd imagine for quite a few games we'll see less than 1080p ala ryse etc. Thats not to say its purely a problem for the xboxone.