It’s no secret that Christopher Nolan made “ Oppenheimer ” to be seen on the big screen. But not all big screens are created equal. That’s part of the reason why Universal Pictures has made “Oppenheimer” tickets available early for over a thousand “premium large format” (or PLF) screens, with options including IMAX 70mm, 70mm, IMAX digital, 35mm, Dolby Cinema and more.