CNN vs Social networking tools

CNN has Facebook and Tweeter and real journalists but every now and then something goes wrong to the point that Bruce Scoble of Scobleizer tweeted about this failure in Iran. SO is this the beginning of the end for broadcast journalists? Is it the beginning of a new role for the millions with other means of communications to step up and be heard. Many and including myself have and continue to criticise Democratic State for their arrogant treatment of developing countries. However we continue to support the efforts of those whose voices are hardly ever heard of given our attention. Any thoughts?