It rather amazes me how intelligent people who've lived through some of the most rapidly changing times ever seem sure they know the future. Imagine a glut of

It rather amazes me how intelligent people who've lived through some of the most rapidly changing times ever seem sure they know the future. Imagine a glut of cheap energy, rapidly improving materials science, pervasive robotics, and large-scale 3D printing. I think it's almost inevitable that construction costs would come way down. Between telepresence and cheap transportation, the need to aggregate people into urban environments would cease. I think it's highly likely things will go in this direction at some point.