The last writer's stike, the corporations owned the media, but not as much as they do today. You look in the mainstream media, you find very little representation of what's actually going on. 69% of people in Los Angeles support the writers; the media, however, misrepresents them and consequently outside of LA support isn't as strong. (Update: I was wrong about that last part.)
But the writers have YouTube, which they didn't have 20 years ago.
The corporations derive their control over content from their control over distribution. But the Internet creates entirely new methods of distribution; the only remaining resource for corporate control is therefore copyright on legacy content, and the (questionable) usefulness of existing content creation systems. The last writer's strike, the media corporations lost ground to cable. If they lose ground to the Internet, they may lose that ground forever.