The American economy will have experienced a gentle yet relentless decline. Our children will not live such comfortable lives as we do. The spread between the rich and the poor will have grown, and crime will have become so prevalent as to threaten the social fabric. The rich and the poor will form 2 armed camps. Most automobiles and heavy machinery will be manufactured in Japanese owned planets located in America. Yet, agriculture and higher education will be our most successful exports. There will be no fast trains connecting American cities, but a network of levitated superconducting trains will be under construction in Western Europe and in Japan.Replace Japan with China, and we're not far off.
Japan will be the central economic power in the world, owning or controlling a significant part of European and American industries. This "economic dictatorship" will be beneficial to Japan's client states, since Japan benefits by keeping its customers healthy and wealthy. Indeed, a peaceful and prosperous world community will owe its existence to this Pax Japanica.
Back to the (Far-Fetched) Future (New York Times Magazine) No tourists on the moon :-(