For 25 years, Oprah Winfrey has ruled the daytime airwaves by inviting celebrities and statesmen to her couch for friendly tête-à-têtes watched by millions of loyal followers.
But already, members of TV's royalty are plotting to seize Winfrey's crown. Katie Couric is marshaling an insurgency. Anderson Cooper has staked a beachhead. Judith Sheindlin -- aka "Judge Judy" -- has built her own fortress with more than 6 million daily viewers. Ellen DeGeneres is carving out her niche as the queen of nice.
There's even an opening for a new jester of daytime as Regis Philbin -- who has logged more hours in front of the camera than any player in the realm and turns 80 in August -- exits "Live! With Regis and Kelly." It could be years before any of the claimants emerge as Winfrey's rightful heir -- if at all.
Daytime television may never again give birth to an über-personality like Winfrey. With hundreds of cable channels and thousands of Internet sites vying for people's time, it is becoming ever harder for an individual to command a common audience of shared interests and empathy.
The turnover comes as soap operas -- once the chief form of escapism from the tedium of household chores for countless women -- are nearly washed up.
When ABC's "All My Children" and "One Life to Live" end their runs next season, only four network soaps will remain on the air, compared with nearly a dozen a decade ago. At its peak in 1981, more than 14 million people watched "General Hospital" on ABC. Now, fewer than 3 million tune in daily.
Societal and demographic changes are at the heart of daytime TV's upheaval.
"There is a transition going on in daytime television, and it is a generational change," said Ken Werner, president of Warner Bros. domestic television distribution.
A wave of women flooding the workforce has been accompanied by a rise in the popularity of shows featuring women in charge of their lives -- and influencing others.
Staple soap opera themes of women in jeopardy or navigating relationships have given way to role models such as Winfrey power-brokering presidential candidates on her show, upscale female professionals crossing swords on "The View" and litigants submitting to justice dispensed by a stern 68-year-old schoolmarm in a lace collar on "Judge Judy."
"Women no longer feel that they need to have an escape in their daytime television," said Brian Frons, president of daytime programming for the Disney ABC Television Group. "They are looking for information so they can take an active role in changing their lives. It's a huge difference from what we've seen before."
In that environment, it's not surprising that personality-driven, issue-oriented programs have stubbornly held on, accounting for the interest of television news' big guns Couric and Anderson heading to daytime. Talk shows that delve into topics of the moment, deliver an upbeat message and make their way onto Facebook favorites and Twitter streams -- such as ABC's "The View" -- have even seen their audience level perk up during the current TV season.
Trading the evening for the daytime shift may seem to carry the whiff of going down-market, but it also holds the promise for much greater riches: Talk shows can be a powerful launchpad for a branded media empire, as demonstrated by Winfrey, Martha Stewart, Phil McGraw and Rachael Ray, who have all developed offshoot ventures, such as magazines, books and merchandise.
Still, in an era when the media business is being radically reshaped, daytime television often looks caught in a time warp. TV programmers have not strayed from the well-worn formats of talk shows, game shows and court shows that were pioneered decades ago. When Winfrey takes her final bow, the new ratings maven of the afternoon will be a onetime family court judge.
Now wrapping up her 15th season, "Judge Judy" continues to preside from a soundstage on Sunset Boulevard in Hollywood. Sheindlin's audience in recent years often has eclipsed Winfrey's and earns her a paycheck of about $43 million annually, according to industry insiders.
"Our core viewing audience has been the baby boomer generation, people who are very loyal to their schedules," said John Nogawski, president of CBS Television Distribution. "If they grew up watching Channel 4, they still watch Channel 4."
But people younger than 35 aren't as dependable. "They are more fickle," Nogawski said. "Their loyalty -- even to the medium of television -- isn't as strong."
Blame the Internet. Some 50 million people are playing social games like Zynga's Cityville and Cafe World, with those between ages 18 and 24 -- the most difficult audience for network advertisers to reach -- the heaviest users. More than 102 million women are on Facebook. And the time this crowd spends on the Internet playing games or checking Facebook updates is time away from daytime programs.
Consolidation in the entertainment industry also is leading to less variety on the daytime screen. Five companies now make the bulk of daytime programs and, whereas five or six new shows used to premiere each September, now the number is down to one or two.
For TV stations, carrying an afternoon Couric talk show would seem like a reasonable bet after her successful 15-year run as co-anchor of NBC's "Today." Couric, 54, appears to be looking for a more comfortable fit after a rocky five-year run on the "CBS Evening News." "It might be nice for me to have a little more wiggle room to show my personality," Couric said last month on "Today." CNN's Cooper, who turns 44 this summer, also sees a daytime talk show as a platform to stretch his talents.
"There is a lot of opportunity to do a program that has variety; something that can cover a huge range of topics and become a place to tell interesting and intriguing stories," Cooper said. "I'm a more multidimensional person than a news environment will allow."