According to recent domain name registrations, Ubisoft may be planning a Watch Dogs movie. They've at least registered the domain names for WatchDogsmovie.com and WatchDogsthemovie.com, as well as a couple other variations.
Of course, Watch Dogs is, in the eyes of the public, just a trailer and demo for a video game that isn't set to be released until 2013, so it might be a bit premature to be looking forward to a big budget Hollywood spectacle. It's more likely that the domain names represent the possibility of a movie, rather than one in the works--Ubisoft likely wants to keep anyone else from squatting on the domain names of their intellectual property.
While it's probably premature to imagine much progress on the film, on the other hand, nothing makes deals like "heat" in Hollywood, and it wouldn't surprise me at all if big film companies are already meeting with Ubisoft to see who gets the film rights. After all, the introduction of Watch Dogs was the story of E3 2012, and that's the kind of thing that show business takes pretty seriously.