Lots of people will only go to the cinema for an experience they can't get at home. They will go for the special effects or to see some great cinematography. Otherwise stream it and watch it indoors or just wait for it to be on netflix or such.
Because we are getting adult big budget movies now. MOS and BvS for example.
Or going straight to DVD/BD with former box office draws like Nicolas Cage, Bruce Willis and to a larger extentWe are starting to see a bit of a comeback for these types of low/mid-budget movies thanks to Amazon and Netflix who are hungry for content.
Also we have a good amount of original movies; but they're the smaller stuff like Ex Machina and It Follows.
it's just that tentpoles are now focused on established IPs, be it comics or public domain stuff. In fact the closest thing to anything original if it's a franchise is if it's based on a book series. It's almost like a testing ground to see if people would bite. That includes young adult or even Gone Girl which has a big following before the movie came out.
Which, I think, is kinda of a dumb point of view. Because even without a huge special effects spectacle, you can't get the same experience at home.