Large Format still alive
I have a photo gallery on the west coast of Canada, and I get to talk to and see a multitude of photographers and photographs. My perspective is that 35mm colour film is going to be nearly extinct in about 20 years, except for perhaps a few speciality products. For the average consumer, colour digital is easier and cheaper. For the professional digital can actually be better because if gives you the type of control over your prints - paper, ink-sets, curves, printer drivers, etc - that traditional BW photographers have always had with their chemicals, dilutions, toners, temperatures, etc. There will be 35mm colour film made as long as there enough 35mm cameras in use.
My understanding is that the current digital 35mm (equivalent) cameras give a file size that is roughly equal to the information captured by a 35mm piece of film. This is, I believe, why many photographers who shoot for art or even commercial work are moving to medium format and large format film cameras. The amount of information a larger piece of film can capture surpasses a digital camera, unless you willing to spend $10,000, $30,000 or more for a medium or large format digital back. You can buy *a lot* of film for $10,000 - plus the computer needed to handle files in the 100Mb to 600Mb range.
My understanding is that Black and White film and paper is actually an *increasing* market share. As photographic artists look for something "non-digital" ( seen as being "un-artististic") they are moving to traditional materials. I read somewhere that the Rochester Institute of Technology (Rocherster being the home of Kodak) is going to move their film based photography program into their Alternative Process courses.
The photo school I teach is phasing out their darkroom to increase the the computer lab. Once the traditional lab is gone, then large format becomes very much more difficult to teach. Or at least more expensive as the students then have to use colour film and commercial proccessing.
I have a couple of 4x5s, an 8x20, and even a 20x24. The last one doesn't get outside much
Just my observations.