Few weeks of any year are bigger or more important for the business of movies than CinemaCon. The annual gathering gives studios, theater owners, and exhibition-minded tech companies a chance to show off the most exciting developments in the movie business. But while the innovations that debut at CinemaCon may have important implications for the theaters where viewers get their film fix, the biggest news out of the convention almost always comes from the stage presentations, where studios show off their biggest gambles.