I think we will see widespread migration of people, driven by cheap solar energy, global warming, water shortages, self-driving transportation, 3D-printing, fast mass transit like the Hyperloop, and hopefully holographic-videoconference based telecommuting.<p>When you no longer need to live close to work and you no longer need to be in a major population center to get a wide variety of consumer goods delivered to you, there&#x27;s little reason to live in <i>either</i> cities or suburbs.  People are free to form autonomous communities connected to the global economy by the Internet, and will likely do so in areas least impacted by global warming and water shortages.