So the question is, do more or fewer than 300, 000 houses per year fall out of the stock because of age, obsolescence, or simply because they are in the wrong place?

FORBES: Is The Housing Recovery For Real?

Or are you inadvertently creating your own obsolescence by failing to negotiate?

FORBES: Two Strategies for Avoiding the Career Combover

But a new kind of planned obsolescence has already come in the form of quieter or more beautiful, or meeting a style need, or thinner or lighter or more elegant.

FORBES: Enough Already with the "Death of the PC Era" Garbage

Or, market leaders could follow the well-trodden path to obsolescence, like Ames Department Stores, Woolworths, Digital Equipment, Wang Laboratories, Kodak, Motorola, Blockbuster, Borders, Tower Records, and numerous other one-time market leaders.

FORBES: The Lesson That Market Leaders Are Failing To Learn From Xerox PARC