People talk about the TV screen. And there the problems stand in the form of legacy companies sitting on mountains of great content they are not willing to share in new ways. The technology part is easy.
But I'd like to talk about the movie screen at the movie theater. Digital screens could still have projectors. But there would be no physical film. And the theater owner would not decide what movie to play, or even the show times.
Every movie ever made anywhere would be an option. Once a certain number of people buy tickets to that movie, it would get scheduled to play. Some places that number might be 10, some places 50, some places 100. The movie owners get their cut. The theater owners get their cut.
And you'd get to see online how close to the threshold a particular movie you desire is. You could run social media campaigns to get your friends to join you. Ticket buyers would thus help with the marketing.
No movie would ever get old. All movies would have immediate global distribution. I think the results would be surprising. Bollywood might take over the world at that point.