Blade & Soul - Stunning visuals and uber fluid combat moves.
Alien Isolation - Not exactly machine breaking but looks fantastic.
Another mention here for Trine 2 also...

BioShock Infinite. Not technically, but in terms of art direction and the level of thought which went into the environments.
Trine 2 in 3D needs to be seen at least once by everyone. It really is a showcase game.
