There will always be enough demand for film to keep some coating plant of some size operating at a profit. Kodak's size is the problem, not their product. Prices will perhaps go up although I don't know enough to know if that is unlimited. I think film prices will stabilize at the point where X's customers move to digital. So there they sit; making a certain amount of profit and employing a certain number of people: A nice little business to be in. A boutique business, like Leica perhaps. The scale is critical. It might just end up being a couple suppliers with neither of them being Kodak or Ilford.
Nobody here really knows how much film is being sold and nobody here (except for a few) knows how much film one needs to sell to keep a plant of size X running. Everyone is just talking through their hats.