People feel the same natural thrill at capturing an extraordinary event and posting it online as photojournalists must have once felt when they found themselves on the scene at some momentous occasion.
We are seeing this more and more. I have three small video cameras... and I use them all the time. I don't think any citizen should be without a personal video camera.
PJ's will still dominate the long form journalistic story, but there will be pushback there as well. And the amateurs with cameras, video and a Mac will be changing the world from within- as a participant... not from the edges as an observer.