According to Pew: 44% of U.S. users have contributed their thoughts and files to the online world. Expect that figure to go higher.
More and more we are being given the tools to not only contribute, but compete where before the resources were out of reach, for example making movies. Or more immediately, punditry and opinion from weblogs has completely replaced it from traditional media for me. Same with music/TV/movie news and reviews and so much more.