Set aside for the moment the prognostications (photojournalists now are true freelancers, bureaus and newswires are disintermediated, everyone a photojournalist) and the objections (who wants to negotiate for every single photo, who wants to slog through all of the junk that will be uploaded, etc.).
Instead, consider this:
The implications for China are huge. How do you possibly manage your image to the world when all of a sudden million of your people are potential sources of news photographs?
I’m taking bets: how long before the authorities block Scoopt and Flickr?