AT&T CFO John Stephens masked up and went to the movie theater to enjoy Warner Bros.’ “Tenet,” the Christopher Nolan film currently dominating both the box office and industry buzz.“I couldn’t have imagined being able to see that and enjoy it in the same way here in my home,” the telecom and entertainment company senior executive vice president said on Wednesday.“We understand the distribution model is going to evolve,” Stephens said at the Bank of America Media, Communications & Entertainment