I imagined some type of advanced 'hub' where players can connect with each other and they can jump into any world they choose. They could create their own world (with the help of AI), or they could join a world created by another human or even a simulation that is entirely made by an AI. I think those simulations will be so believable that they will be indistinguishable from reality, to the point that we will question our own reality and what does "real" mean when a simulation will attain a certain level of complexity. I do think we’re going to live most of our lives inside simulations.