Suburbia would have to disappear - at least for those who can afford to not live there - because when we were spending 16 hours a day there we'd realize what a terrible place it is to live. Big cities would still be desirable places to live - they still have theatres and concert halls and museums and art galleries - in fact they might become much more so, as car ownership became less common. At the same time, since leisure travel is a much poorer source of income for mass transit than commuters are, rail and bus services would decline - so overall transport would be poorer, and the gap between rich and poor - city and country - would widen. Small towns would shrink and vanish, because many of them exist solely to support one or two industries in that town.
