For me it's hands down Batman Arkham Knight what's yours?
Project CARS, Dying Light, Batman, Metal Gear Solid.
Probably some other I forgot too!
Witcher 3, Arkham Knight, Star Citizen and a potential release for Fallout 4
Witcher 3 so far looks amazing, and I am utterly hyped for The Phantom Pain. Really hope that KH3 and FFXV end up on PC (though not having high hopes for that one), otherwise It'll probably be the only reason for me to pick up a console in the future.
My GTX 970 and i7 4790K hunger for the Witcher 3 at max settings or high at 1440p. Let the feast commence
Mine would have to be GTA 5 for the PC, its good on the Xbox but i prefer PC 100 times more
Witcher 3, Killing Floor 2, Hotline Miami 2, the full release of Grim Dawn and there's probably something I left out. edit: Pillars of Eternity!
GTA5, Hotline Miami 2, Dying Light and surprise hits.
Oh and Oculus Rift. Not a game but worthy of a mention.