I think that people haven't thought very deeply about what kinds of minds there would be in the virtual world. You can always try to mock up a simulation of hunger and thirst and bodies, et cetera, and try to make it as human as possible. But would you want to do that? I don't know. Maybe that's just a bad idea. And you could come up with a better system. So I am not sure that the TV slash movie slash novel idea that we human beings are going to basically transport ourselves more or less into a virtual realm is the right way of thinking about it.