I think you can call wikipedia a "high quality web content experiment" that has done quite well. The catch is one needs to figure out: - How to create high quality on a low budget? - How to make sure it appeals to a larger audience? - How to let that audience find you? - And how to monetize said content?

To me the market is still evolving, but I'm excited about the idea of people paying for eBooks and apps — something that wouldn't have seemed possible in a Napster world before iTunes.