Apparently, it means you'll have to think:

Clooney, who has just directed Good Night and Good Luck, which is about CBS television news in the 1950s, said he grew up with three network broadcasts, all professional operations that allowed him to judge what was going on in politics and in Vietnam.

Now, with the onset of cable television and "130 different channels", the quality of news was "fractured", with each network, like Fox, playing to audiences with "specific belief patterns". Viewers had to switch channels continually to discover what was going on in the world.

You mean like when the CBS and other networks reported the Tet Offensive as a massive strategic failure, when it was, in fact, the biggest victory since the start of the war? You mean the fair-minded reporters who covered Vietnam like this:

During an NVA attack of a nearby village, several South Vietnam civilians suffered burns whe the enemy torched their homes. The injured civilians were brought to our dispensary for medical treatment. Two reporters appeared at the main gate to do a story on how the Americans "accidentally napalmed" the village. The village had not been napalmed. There had been no air strike. But the reporters had decided inadvance what the story was. The wrote that the village had been napalmed. [Useful Idiots, p. 34]

Yeah. It was so great when people listening to those stories weren't confronted with any other contradictory voices, presenting inconveniently omitted facts.

So, um, back to Clooney. Do you see any connection between his complaint...

He added that Hollywood was suffering "one of the worst summers on record" for box office takings after a flurry of big-budget flops.

... and Hollywood's recent fixation with churning out an endless stream of preachy politically-loaded material like this:

Clooney's film chronicles the 1950s conflict between the broadcaster Edward R Murrow and Senator Joseph McCarthy, the chairman of the House un-American Activities Committee, whose witch-hunt for communist sympathisers split the nation...

No? Me neither.