One way that people may live in the future is in Autonomous Houses.
An Autonomous House is a house that is (almost) completely self-sufficient. It will have its own power, heat, light, communications equipment, garden, waste-recycling, water supply, etc. It should be able to catch rainwater, sunlight, and wind power so that it needn't rely on external sources, and can work where there are no utilities.
It will be movable, too, and should work just about anywhere on this planet. Eventually, it should also be self-sufficient enough to work on the Moon and other planets.