The Witcher 3: The Wild Hunt, CDPR are a developer on the rise, TW 2 was an amazing game, and to think of them combining their great story telling and characters in an open world world, substantially bigger than Skyrim, is mouth watering.
Also, brothels.
Right behind it is Watch_Dogs. Ubisoft are onto something big here, I also love the fact that other people, via online, are in your world, basically spying on you, trying to sabotage your missions.
It's good they mentioned you can turn that feature off, but they thought of doing a mission and not knowing someone has joined your game, "stalking you", keep track of you is mind blowing.
Can't wait/