Cities that already exist will look very different from new cities that will arise. I remember recently reading an article about a city that they are planning to build somewhere in the Middle East. It said that the entire city will have an environmental control system to keep it cool in the desert heat. I think that an ideal new city will take care of all transportation. Nobody will be driving cars. It should be easy for all people to get anywhere they need to with some kind of automated system. They should also have an efficient way to get good into the city. Perhaps they could bring containers of good into the city through some kind of underground tunnels. I agree that buildings will probably keep getting taller. Renewable energy will become more and more pervasive.