Richard Florida says that The days of urban sprawl are over:

What’s happening here goes a lot deeper than the end of cheap oil. We are now passing through the early development of a wholly new geographic order – what geographers call “the spatial fix” – of which the move back toward the city is just one part.
Suburbanization was the spatial fix for the industrial age – the geographic expression of mass production. Low-cost mortgages, massive highway systems and suburban infrastructure projects fuelled the industrial engine of postwar capitalism, propelling demand for cars, appliances and all sorts of industrial goods.
The creative economy is giving rise to a new spatial fix and a very different geography – the contours of which are only now emerging. Rising fuel costs are one thing, but in today’s idea-driven economy, it’s time costs that really matter. With the constant pressure to be more efficient and to innovate, it makes little sense to waste countless collective hours commuting. So the most efficient and productive regions are the ones in which people are thinking and working – not sitting in traffic. And, according to detailed research by the Nobel Prize-winning economist Daniel Kahneman, commuting is among the least enjoyable, if not the single least enjoyable, of all human activities.

What is implied but not expressly stated, is that the suburban sprawl of the last 60 years was enabled and fueled by the subsidization of basically free transportation by the federal government. The suburban condition is not a natural state as has been often stated by suburban apologists, developers and the construction industry. It is only natural that a correction is happening, especially in light of our energy situation.