San Francisco is probably an outlier, but with the median house price at 1.1 mil, and full time child care costs for two preschool kids at $40-50k a year, a plasma tv is a minor rounding error in the cost of living.
So while I agree with you about the TV, and the car, and the consumerism in general, I do think it may be a way to blame the middle class for not paddling hard enough toward shore as the ocean current carries them out around the rocks.