Martin Scorsese sat down one-on-one at CinemaCon with Leonardo DiCaprio, the star of his new film “Killers of the Flower Moon” about the past and future of cinema.The new film, which tells the story of the murder of Osage natives in the 1920s by oil tycoons looking to take over their resource-heavy land, is the first Scorsese film since 2016’s “Silence” to get a full theatrical release. It comes out at a time when escapist films have been making money as much as ever at the box office while smaller, independent films have largely struggled to find their way back.