To your point last weekend I watched the entire last season of "Game of Thrones" using plex and cast it to my tv. At the same time my wife and daughter were watching "Cinderella" on Plex and later that night my daughter had some friends over and they pulled up "Inside Out". Not a penny out of pocket for enjoying any of those movies and the bathrooms were cleaner and the snacks better (and cheaper) than the theatre (I have an "in" with the proprietor). And - not trying to be crass here but being totally serious -there's a lot less chance of some crazy or some terrorist going on a rampage than if I was stuck in a movie theatre. No way i'm going pay to go into one of those death traps to see a first run movie like the new Star Wars in December when i can just wait for it to come out on plex for free in the new year. I'm in no hurry.
Technology is a funny thing. It changes things in ways you never thought it would. Used to be Playboy Magazine was the "go to" for soft porn, Penthouse if you wanted a little more adventure, and Hustler for the really dirty stuff....but you had to go to the news stand and buy one in a a brown paper wrapper, or subscribe (ah...the ol' subscription model!- and they "own" the content too. Foolproof right?) Well, the advent of the internet and the resultant proliferation of free porn has made Playboy a rather quaint relic of a bye-gone era and just recently they threw in the towel and announced they were no longer going to publish nudie pic's....WHAT?!!!!
Who knows where television shows and movies are heading as a result of free dissemination of content but there's a good chance it's not what you think it's going to be.
Edit: And before someone accuses me of pirating those movies, I was simply provided access to the library of titles of a friend (and quite an impressive library it is!) - Plex let's you do that. No different then lending a book out. Now where this friend got all those titles I have no idea, but just as I would assume that someone lending me a book had originally purchased it or was given it as a gift, I assume the same with the movies.