This weekend, tens of millions of people in the United States and tens of millions more around the world, in Columbus, Georgia, in Cardiff, Wales, in Chongqing, China, in Chennai, India will leave their homes, they'll get in their cars or they'll take public transportation or they will carry themselves by foot, and they'll step into a room and sit down next to someone they don't know or maybe someone they do, and the lights will go down and they'll watch a movie.