Today, a depression could reverse that process altogether. In a deep and sustained downturn, home prices would likely sink further and not rise, dimming the appeal of homeownership, a large part of suburbia's draw. Renting an apartment - perhaps in a city, where commuting costs are lower - might be more tempting.

If we look closely, however, we might see more former lawyers wearing knockoffs, doing their back-to-school shopping at Target or Wal-Mart rather than Banana Republic and Abercrombie & Fitch. Lean times might kill off much of the taboo around buying hand-me-downs, and with modern distribution networks - and a push from the reduce-reuse-recycle mind-set of environmentalism - we might see the development of nationwide used-clothing chains.

New technology would grow less seductive, basic reliability more important.