Movie makers became nervous about losing out to T.V. back at the end of the 1940s, when T.V.s were still pretty rarely owned on a large scale. But what has killed off play/movie/and network T.V. has been unions and the garbage that all three things now produce/put on; self inflicted destruction; all!
The end of movie theaters was predicted a decade ago:
Movie studios were very afraid of TV, so they brought out Cinerama and 3D. I’m sure there’s been plenty of predictions of the demise of live theater since the original Birth of a Nation established feature length movies in 1915.