Let's kick off with some initial observations on image quality. Generally speaking, intricate texture detail and high-contrast edges aren't the most obvious elements of Watch Dogs' visual make-up, so the good news is that despite lacking a full 1080p framebuffer, the PS4 edition remains a very handsome-looking game compared to the PC release running at maximum settings. The surprise is how close the pared-down Xbox One game compares; after Titanfall's aliasing issues, we had concerns about Watch Dogs' visual presentation, but it manages to acquit itself rather well overall, as the shots below should demonstrate.
This is all the more surprising bearing in mind the SMAA anti-aliasing technique. Post-process AA doesn't tend to play nicely at lower resolutions, but while there are still some pixel-popping, edge-shimmering artefacts to contend with (also present on PS4, but amplified in comparison on Xbox One), most notably on hackable object highlights, generally speaking Watch Dogs' resolution difference is less of an issue than feared.