With exponential development of AI-powered multisensory immersive technologies, within 10-15 years most of us could immerse in 'real virtualities' akin to lifestyles of today's billionaires. Give it another couple of decades, each of us might opt to create and run their own virtual universe with [simulated] physics indistinguishable from the physics of our world. Or you can always 'fine-tune' the rule set, or tweak historical scenarios at will.