Just to add to the pile: The audio/video experience is actually WORSE than a good home cinema with a UHD bluray.
Many theaters are still 1080p (and its very noticable on a large screen). Even in 4k the vast majority lack HDR.
The new Tron movie, for example, will look much better on a large home screen than it did in most theaters.
So why would I pay them to sit in a room full of jerks on their cellphones and watch it in worse quality?