As we head to Vegas for the annual convention of theater owners, we unpack which studio has the most to brag about at the box office. For those who only know CinemaCon from “The Studio,” just know that the experience of actually being in Las Vegas for a convention of theater owners isn’t entirely as it appears in Seth Rogen’s hit show. But it’s also not not like that (for one thing: we know we’ll see Matt Belloni in Caesar’s Palace somewhere). It’s not just dry presentations. At minimum, studio