I haven't even looked at this game. Like many I just assumed it was like a Sleeping Dogs sequel or something. Watching this I'm rather excited. If even half of this is actually dynamic and not scripted out the ass I'll pick it up.
Only thing that worries me a bit is how easy it appears to hack anything. A simple press of a button and you're in any system in the game? I understand it would get boring QUICK if you had to go through a mini-game on every hack but there should be some aspect to hacking beyond 'hold Q'. Maybe I'm missing something and just haven't looked into the game enough.
Then again this is Ubisoft and Assassin's Creed is basically just that. You basically hold or click one button to do everything from fighting to climbing, interacting, sneaking, you name it.