David Streitfeld

Not everyone views the notion of real appreciation in real estate as a lost cause.

Bob Walters, chief economist of the online mortgage firm Quicken, acknowledges that the recent collapse will create a "mind scar" just as the Great Depression did. But he argues that housing remains unique.

"You have to live somewhere," he said. "In three or four years, people will resume a normal course, and home values will continue to increase."