I don't have any idea how long film will hold out, but as a 23 y/o who only started shooting film 2 years ago all I can say is that I hope film will be here long after I'm gone. I have never had the chance to shoot Kodachrome and Polaroid film, but discovering film has been fun and rewarding. The intimacy of every image shot and made will be something that digital can't capture, for me personally, results matter but so does the process involved. I don't mean to belittle digital and see it as a quick kiss in the dark, I do believe that it is quite as hard as film. However, I find that making a picture out of a negative, from the moment the shot is composed and captured, to the development process, down to the final print requires something else that I can't quite put into words.
To lose film completely will be a loss to photography I believe. Digital is the way forward, there really is no arguing with that but to do away with film completely is not beneficial to photography as a whole. As a famous quote here goes "ang hindi marunong lumingon sa kanyang pinanggalingan ay hindi makakarating sa kanyang paroroonan". Pictures are a part of humanity's culture, and photography is a triumph of human ingenuity. Losing film completely would be very regrettable in the long run.
The only thing I can hope for is that somehow if film becomes a niche that at least it would still be readily accessible with a variety of options in film, developer, etc. in the future. Haha! I'm still 23 but I do picture myself in the darkroom with my future kids printing and developing film.
I do apologize for my .0002 centavos worth of rant, highly uncalled for but since I caught the film wave too late I just felt it had to get out.