Couple Minecraft with the Oculus Rift headset and the Omni, that virtual reality treadmill which allows you to walk around naturally in a game, and you're bound to get one of the most immerse experiences (currently) possible in video games.
You can see what playing with that sort of set-up would be like in this video by Virtuix Omni—which they demo in multiplayer, no less. What do you think, would you play Minecraft like this? Seems like a good way to lose weight, at least.
Virtuix Omni - Minecraft Multiplayer [Virtuix Omni]