Aren't these two largely separate questions? Viability versus if a given incumbent has interest in a market of a given size. With the combination of (at minimum) streaming platforms, the box office, and advertisements video and audio generation would be viable at a remarkably high price point (as compared to the current token prices for other sorts of things). And as the price comes down presumably the market would grow larger - by how much I have no idea but there are certainly a great deal of currently underserved niche markets.
I think the idea that people are willing to consume an even more slopful Netflix is dubious.
There's has already been a decade of complaints about trash content in excess of available viewing hours.
The thing with media consumption is that there exist a finite number of eyeball-hours available, and it's a zero sum game against other non-media consumers.
