Networks yes I can see Disney, CBS, Comcast and Fox right now shifting into On Demand services though given how much Disney and to a certain extent Comcast are both fighting over the Fox Assets though all in the name over going after Netflix. CBS doing the All-Access on demand outlet as a response to go after Netflix and CBS was trying to get a deal to Lionsgate to get distribution and assets to boost the All Access outlet but that got shutdown because the Redstones wanted CBS to merge with Viacom.
With Local TV yes there's been a huge stink over the Sinclair/Tribune deal all because of the politics of its leaders and fears of TV monopoly at play there. I can see Local TV station owners shifting over into the news or talk content business given the hype over Scripps Newsy outlet, Gray/Raycom over investigate TV, and yes Tribune/Sinclair over making their stations into a news/talk outlet.
Yes there have been persistent articles over Sinclair/Tribune trying to hype up making their stations air Certain political content for over a year being the New Fox News and they have been trying to hype up the Sinclair's talk lineup over Pro-Trump Audiences.
Yes there has been hype over how many Pro-Trump pundits are going to Sinclair and they are trying to play this like Lebron James leaving the Cleveland Cavaliers for the L.A.Lakers type speculation here. I heard that Daytime and Primetime hours have been hyped up over where the pundits are going note some of these speculations have ended up as dead ends though.
In terms of local stations becoming irrelevant, I'm not so focused on politics - I live in the SF Bay Area, so no Sinclair or any other politically motivated broadcaster owns a station. I focus on the increasing irrelevance of the programming in an internet world. I get the reason that locals are going to many hours of news broadcasting per day - it doesn't matter so much who is "Number One" in news anymore, so they all just compete against each other freely. In the SF market, the number one news at 6:00 is
Noticias 14 in Spanish because there are 6 stations running news at 6:00 in English and competing against one another. And it's increasingly cheap to broadcast news ad nauseum because they no longer have to pay astronomical anchor salaries (nobody cares anymore what pretty face is reading the teleprompter), and they can keep repeating the same stories over and over, like CNN.
I don't know if I'm typical or not, but I generally only tune in TV news is there is a big breaking story. Otherwise, I depend on NPR and various internet sources. So I don't see those huge news blocks on local stations as being sustainable in a few years as people switch more and more to internet sources.
As to other local programming? I have absolutely zero desire to watch talk shows, judge shows, soap operas, decades old off-network reruns, and infomercials. Why should I do that when there is so much great programming that is consistent with
my personal tastes - either streaming on the internet, or time shifted from my DVR?