Though you're right that Harrymania is more a product of the " Noughties ", and should stand the test of time far better than Twilight.

As for my own opinions about the pop culture of this decade; I don't agree with CSFB!'s assessment that it was increasingly sterile and anti-intellectual. In fact, I think that the Noughties mark an increasing democratization of pop culture. With the internet revolutionizing distribution, and allowing a free form of publishing, there are more opportunities than ever for people to find an audience-- even if it's just a small niche. Webcomics are a good example; downloadable content to mobile devices is another, as are video websites like Youtube and Hulu. It's not a utopia for artists, but it does offer new possibilities of which we've only begun to scratch the surface.