According to Marketing Sherpa, which I regularly read, the classic demographics are no longer making the grade. New niches are emerging in the current economic climate. In one blog post, they discussed three of them:

The New Frugal: Although they are doing O.K., they are “caught up in the national mood of poverty” and therefore are watching how they spend their money.
The New Cash Rich: This demographic is divided into two segments, the older segment who are flush with liquid assets after pulling money out of the stock market, and the …