Cyberpunk games have been beloved since their inception, but the only one I can think of that's come close to the ambitious heights Ubisoft Montreal's Watch Dogs seems to be after is Deus Ex: Human Revolution (funnily enough, made by Eidos Montreal). If more of that but with a fresh presentation and approach sounds like it'd do it for you, check the videos below.
In short, the premise is today's technology obsession has been taken to extremes in the near future. The attitude taken by the main character seems to be, "If I'm being exploited by technology, I will exploit technology myself."
I can't wait to see this one in its full glory on PC come release time, though hopefully it impresses on PS3 and 360 as well. No date is set yet.