There's just so few things that people actually watch multiple times. The things that people actually watch multiple times tend to be the same handful of movies and shows that rotates over the years. To do that you only need a very small library. Having a large media library is mostly just waste of space, even if it's digital is wasted because you're unlikely to watch 90% of it after the first time.
But, for me at least, not only having media when I'm at home is the real benefit. Not everyone wants to manage their own media server with remote access and the eventual debugging that follows with it.
AR is (going to be) huge within industrial maintenance, so much time can be saved by having documentation and visual aid/guidance right there I your FOV as you do the work. It has the potential to reduce both required skill level or specific equipment knowledge and massively reduce time spent troubleshooting equipment.