Edit: I agree Netflix has good Originals. But most are from the early days when they favored quality over quantity. It is sad to see that they reversed that. They have much funding power and should give it to great art that really sticks, has ambitions and something to tell, and values my time instead of mediocrity.
But TV today is at least 55 inch and in crisp 4k resolution. A modern TV is good enough for most content.
It is not Netflix that killed the movieplex. They were just the first to utilise the new tools. The movie theater became the steam locomotive.
The issue IMO is so few movies are worth any extra effort to see. Steam a new marvel movie and you can pause half way through when you’re a little bored and do something else.
The problem movies have is they have a relatively short amount of time to deliver a complete story. 90 to 120 minutes just isn't a lot of time to be compelling. That's why some of the best movies are split into parts.
Consider Andor as an example. It's some of the best media ever made (IMO) and it simply would not work in the movie format. What makes Andor work is the excellent character development and the time spent building and shaping the universe under a fascist government.
Andor had no length constraints per episode. That allowed it to tell complete satisfying stories with the promise that you'll get more in the next episode.
Andor isn’t as compelling as the original movie or significantly longer than the Harry Potter series of movies. Babylon 5 is probably the poster child for a long running space opera series with a planned story arch, but they added plenty of filler because you don’t actually need that much time.
If anything movies tend to be better than TV shows because of the time constraints rather than the budget.