UPDATE: Sony has since removed all references to Watch_Dogs running at 1080p and 60fps on PS4. Neither Ubisoft or Sony have commented on the matter at this time.
ORIGINAL STORY: Sony and Ubisoft have long touted the PlayStation exclusive content in Watch_Dogs, now however it has emerged that the additional missions will also be available on PC and are a "timed exclusive," meaning they could eventually make their way to Wii U, Xbox 360, and Xbox One as well.
On the PlayStation website's page dedicated to Watch_Dogs, the same one which revealed that Sony believes the PS4 version has the best graphics on any console, the platform holder mentions the four exclusive missions before stating that they are "Timed exclusive. Also available on PC."
Aside from the missions, there will also be a PlayStation exclusive (and this does seem to be limited to PS3 and PS4) white hacker jacket and a hacking boost pack which extends the lenght of time players have to perform hacks.
The extra missions are said to last 60 minutes.
Watch_Dogs will launch on PC, PS3, PS4, Xbox 360, and Xbox One on May 27th. The Wii U version is set for release this Autumn. PS3 and PS4 Watch_Dogs bundles will also be available.