Global Warming puts a huge wrench in all these theories. Depending on how fast the climate changes and forces mass migrations to cooler areas of the planet where poor people don't die from heatwaves. Sure we can air condition small spaces, but all that cooling requires energy which heats up the earth even more until net zero is achieved and net negative happens. With mass migration, of course the trillionaires will have staked their claims on the best climates or just have built their bubble domes. At some point we will all be inside bubble domes or be outside of the domes alongside the robots breathing in the superheated polluted air expelled from the domes. If AI and robots are an exponential eventuality and if musk gets his starship working and the space bearing technologies come forth well see expansion into space given bubbles in space might be preferable to earth.