Raph Koster, a game developer and author of A Theory of Fun for Game Design, has some interesting thoughts on the longterm implications of Facebooks foray into virtual reality. Virtual reality has much greater potential than merely making games more lifelike, he says. Its about creating the Metaverse, a marriage of the internet and real life, in which its possible to tour Machu Picchu, build a cathedral, and have sex with a stranger without leaving home. The one that understands countless layers of semantic tags upon every object on earth, the one that knows who to show you in Machu Picchu, the one that lets you turn whole visualizations of reality on and off.