But what has happened in the last five years can’t even be captured by the word “change” – it is as if the most fundamental laws of the media universe have been overthrown.

Sure, some changes count as “more of the same.” The big three networks, which divided 90 percent of the primetime audience 30 years ago, now divide about 30 percent, but they are still the dominant players in primetime.

And the major alternatives – basic cable channels like Lifetime, ESPN for sports, HBO for pay-cable alternatives – are thriving.

But where the last five years have brought a revolution is how information and entertainment is delivered, and where.

Five years ago, MySpace was the barest glimmer of an idea for a social networking site in Los Angeles; it’s now a worldwide presence, with well over 120 million visitors a month.

Facebook didn’t even exist five years ago. It now draws more than 200 million visitors.

Ask anyone about YouTube before 2005 and they’d have thought you were talking about an ointment. By last fall, it was drawing a hundred million viewers a month. Every minute, ten hours of videos are posted, ranging from news, sports, and entertainment clips to original creations. If you want to see what Mentos and Diet Coke can create in combination, YouTube provides the answer – dozens of them.

Well, okay, just more sources of media, right?