Odd anecdote (a partial reply to you and someone else way up above):
These days I tend not to buy games when they are first released unless I think I'm really going to enjoy it (enough so that I'm willing to risk getting bit, usually reserved for certain developers and franchises). Ubisoft is not on that list, and Watch_Dogs is a new property so neither of those circumstances apply, it just seemed like something I'd dig.
I pre-ordered via Steam, preloaded prior to release and was playing within an hour of it being unlocked last night. Some notes: According to NVIDIA, my GPU (650M) is below the minimum required specs (GTX460), yet the game was playable at medium settings (didn't check actual FPS, but when I say playable I mean frame rate was fluid and nothing seemed missing graphics wise). I didn't even bother checking for driver updates (of which there was one) until after I got done playing (knowing my luck, it will now enforce that minimum spec and be unplayable).
Only played through the first hour or so of the game, some of the dialogue seemed a bit wonky, but the gameplay was fun, "hacking" traffic lights and in the middle of a car chase is a fun take on this style of game, though I could see novelty wearing off after awhile, as it's a rather simple system (hacking multiple traffic lights in a planned route would have been cooler). Initial impression is good, but I know it's possible to go downhill from there (I'm looking at you Assassin's Creed).
One issue I have with it is that it seems like every guard you run into on a mission so far is literally a "bad guy". These are guys working security for a major corp, and it feels like everyone of them have something negative in their profiles (child pornographer, drug addict, arsonist). Granted, I've only done one combat oriented mission so far, so maybe it's unique to that mission. I'm not sure how many people would agree with me, but I think seeing profiles like "Father of two", "Soup Kitchen Volunteer", "College Dropout" would give at least some players pause in how they would handle the situation. Overt combat or stealth? Do I really want to kill a retired kindergarten teacher? Then again, given another recent discussion here on /., I'm probably just weird.