Well the keyboard would be nice, so I could make a first person game set in a full-size, 100% accurate, real-time updating 3D rendering of the entire planet. You could be and do whatever you could possibly imagine.
a sandbox game that simulates all of physicswith no errorto subatomic levelsand you can do anythingsuch as creating a new universe and allowing everything to happen on its ownand you could speed it up, so that the entire universe forms to the point of multiple intelligent races within a few minutesit would be amazing
a game where you play an elaborate song on a piece of tissue paper after believing your neighbour is a ghost because you killed his wax statue with a flying disc
A Sims Game so realistic you dont know whats real or not.