According to the PlayStation website, Watch Dogs will look the best on the PS4.
On the website Sony boasts, “The world of Watch Dogs comes alive on PS4 with the best graphics on any console and exclusive missions found only on PlayStation. Hack everything as you make your way through Chicago’s underground as you experience Watch_Dogs in a way that only PS4 can provide, at 60 Frames Per Second in 1080p.”
The website also mentions that the four PlayStation exclusive missions are timed exclusives and will be available on PC.
Watch Dogs will be coming to the Xbox 360, Xbox One, PS3, PS4 and PC on May 27. The Wii U version will come out later this year.