Yeah, the crossover between theater and film, where it relates to mainstream film, only ever really applies to actors. With television and film schools being around as long as they have there doesn't need to be any crossover. Darryl's right about it being about money. Is anybody going to remake The Passion of Joan of Arc? Is anybody going to remake Wild Strawberries, or Eraserhead? Fuck no they won't, because remakes come about because of 2 things, in general -
1. Reduced risk - Same principle as infinite sequel syndrome. You don't have to go out on a limb with investors or the public with a new venture. You're going to get free press and people will come into the movie expecting something. If it's something like Raiders of the Lost Ark, then everybody remembers the source material, most people have fond memories of it, and most of those people are not terribly discriminating. Free money!
2. Vanity projects - This happens less often, and it's the only reason why obscure movies get remade (aside from, say, the occasional oscar baiting). In some cases, like Soderbergh's rather boring remake of Solaris, it's an actual homage. In some cases, like Spielberg upcoming Old Boy remake with Will Smith, they think they can put a "different spin" on the material. In other cases, like the Bad Lieutenant remake, nobody cared about the original and an indifferent director and a big star decided to take the material without much input from the original creative team (although that movie looks fucking awesome)
Quality of the material is incidental.