Via Planetizen, Richard Florida argues the decline in the popularity of
suburbs is not just a product of rising oil prices, but a result of a
new "spatial fix" that is reorganizing how and where people live their
lives. From Florida’s column in the Globe and Mail:

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.