I really like this idea, especially since it plays well with Simulation arguments. But unless there is some kind of inception-like time distortion occurring in a Simulations-all-the-way down scenario, then disappearing into virtual worlds is not eternal. Eventually every star will burn out.

I think that at least some people (and when you're dealing with galactic timescales and spaces, this means a lot of people) would stay in reality to figure out how to get around entropy and heat-death.

So even though we might very well be in a simulation of VR-checked-out civilizations (or even if we aren't), I would expect to see some people in our simulation/reality fighting against the parameters of the simulation/reality that puts a time-limit on existence.