ZehDon
Member
This far into development, they know exactly what they're doing with resolution in terms of target performance. Most likely, they have two options available to them:
- The Xbox One version cannot sustain a playable game at 1080p, whereas the Playstation 4 version can - maybe with an acceptable dip or two. This requires the Xbox One version to have a significant degradation in image quality in comparison to the Playstation 4 version, such as lowering it's target resolution to 720p. Platform holder pressure from Microsoft would make this option undesirable, as it undermines their entire platform with a single, high profile game.
- Presenting the game at 720p across all platforms makes the next-gen versions of the game seem weaker, undermining the entire "next-gen" aspect that they're selling with Watch_Dogs, and that made Watch_Dogs the headliner it has become. On top of this element, the assets were most likely created for high resolutions; not supporting 1080p on any version invalidates a good deal of work that went into creating the high definition assets.