The Writers Guild of America has gone on strike.

In the hierarchy of things the American public seems not to care about — the national debt, Paris Hilton’s charitable works, Fred D. Thompson’s campaign for president — the Hollywood screenwriters’ strike probably wins hands down.

If negotiations that were continuing deep into the night were unsuccessful and no delay was agreed upon, this morning 12,000 members of the Writers Guild of America will be trading their laptops for picket signs in New York and Los Angeles.

The financial markets, along with the public, has yet to muster much more than a yawn about the possibility that the authors of much of the content in theaters and on television will walk away and wait for a better offer from the Alliance of Motion Picture and Television Producers.

It’s been almost 20 years since the last writers’ strike, and those who do remember probably recall that everyone managed to get through it with a minimum of trauma. There were still movies to see, television programs to watch, and hey, if Letterman was a little short on jokes, no worries. He’ll be back.

The question this time around is different for both the studios and the writers: will viewers be back?

Just in case you haven’t been following it closely — shocking, that — the writers announced a strike to begin today over the producers’ unwillingness to give them what they figure is a fair cut of the so-called new-media revenue and to revisit the issue of compensation for DVDs.

Screenwriters argue that their labors generally create programming that has very high value — value that would seem to multiply as it spread over more platforms.

Media companies have a story to tell as well: If they are about to make jillions on new media, the markets don’t seem to think so.

If the strike is a lengthy one, television will slowly begin to reflect that the writers’ room has emptied out. Some talk shows will hit the repeat button immediately; soap operas will dry up; and after a time, some episodic television shows will run out of new material.

That leaves reality programming, sports, news, cooking shows, travelogues, entertainment news shows, documentary programs about animals, antiques and crime — and that’s not counting the movies and shows many of us have backlogged on TiVos, DVRs and Netflix. Oh yes, and the Internet: YouTube isn’t going on strike.

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Both “The Daily Show” and “The Colbert Report” are highly topical and rely on dozens of writers to remain so — writers who became members of the Writers Guild of America in the last year and a half. Both shows will switch to repeats immediately — which, however hilarious you find Jon Stewart and Stephen Colbert, sort of reduces the appeal of shows that thrive on the annotation of current events.

Laugh all you want, but the news diet of a vast number of younger viewers is about to shrink. Talkers like Bill O’Reilly and Larry King will continue to bloviate, network news will dutifully report the day’s events and even Jay Leno may be able to fill the hour (although the prospect of his working without snappy cue cards isn’t a pleasant one). But younger viewers have come to depend on Mr. Stewart for news beyond what’s on their Facebook page.

“Some people are able to use those programs as a shorthand to learn about events and see them lampooned at the same time,” Mr. Rash said, adding: “It is a bad time for Colbert and Stewart to go dark. Something will be lost in the run-up to Iowa and New Hampshire if they are not around.”

There are indications that Mr. Stewart and Mr. Colbert will come back in tweaked form if the strike is a long one, leaning on interviews and other writer-free approaches to keep both programs alive in a very busy political season.

Jon Stewart offered some remarks on the upcoming strike in a recent episode of “The Daily Show.”