Microsoft HoloLens demonstrated with specially designed version of Minecraft. We get to see the game actually 'projected' through the headgear and it couldn't look more awesome. We can even 'pinch' to manipulate the view.
The wearer has access to special commands, like being able to call down a lightning strike, and can 'explore' areas of the map other players can't see.
Witness this technological witchcraft below.