Jason Kilar speaks at the Business Insider Ignition conference in New York, U.S., on Thursday, Dec. 2, 2010.Peter Foley | Bloomberg | Getty ImagesOn Thursday, AT&T’s WarnerMedia announced it would release its entire 2021 slate of films directly on HBO Max at the same time they hit theaters. Investors and industry-watchers greeted it as earth-shattering news for the movie theater industry. AMC Entertainment fell 16% on the day. Cinemark fell 22%.WarnerMedia CEO Jason Kilar thinks they’re overreacting.”Everyone should take a breather,” Kilar said in an interview. “Let’s let the next six, eight, ten months play out. And then let’s check back in.” …