The history of TV, in reverse. And then forward again.
At first, it was an impossibly expensive medium rules by a cartel of agencies and advertisers. Eventually, HBO comes along and shows you don't have to just make a bunch of lowest common denominator drivel.
Netflix eventually shows that the internet can be a way cheaper model than cable. Finally, money shows up in the streaming model, remaking advertiser friendly cable in the internet age. All in about 2.5 decades.