Interesting. My problem is that if I imagine this future of simulating the infinite spectrum of computational universes then we have to ask "on which source of energy are the simulations going to run?". Because if they need a source of energy, that is going to be limited by stars' existence so... once the source of energy is gone, the simulation is also gone - they still depend on the physical world, they can't escape the fact that the Universe is going to decay into deSitter space, thermal equillibrium. A depressing thought in the end.

We have to run through this learning curve, there is no other way.