Today's cities are more evenly populated. They are made up mainly of small, almost self-sufficient buildings, which produce their own heating and cooling thanks to thermal paints and vegetation covering roofs and walls. Connected, everything can be done by thought... opening, heating, ordering... housework is done autonomously by specialized robots. We don't meet much, since we go out less and virtual contact makes us almost present, thanks to 3D holograms. Human beings are more inward-looking, no longer travelling to meet or work.