Yeah, I know. It's the same thing I wrote before. But this is a discussion, where we just assume that something is possible, and then discuss it's consequences. It's just wild speculation, but it's quite interesting. (at least for me, I just want to hear your ideas about that)
And, about the computer power issue, I've got another theory (yes, another wild speculation!:speakcool

The laws of physics in the simulated universe (our universe) can be different from those in the "real" universe. So what if they allow computers WAAAYYYY more powerful than those that can exist in our world?
Just my crazy ideas...