"But the fact that the vast majority of adults in the US can afford the disposable income to acquire such a luxury, a device that we could scarcely envision 15 years ago, is a sign of how healthy capitalism is."

I take it as a sign of the deflationary nature of technology and economies of scale.

Capitalism is a very fuzzy word. I'd say markets and the price mechanism clearly work better than barter. Poorly regulated capitalism is unhealthy.