I think there are actually two questions:

1. Does film have a future?

2. Does AgX photography have a future?

The answer to question 1. depends on the future demand for film. If at some time the demand for film products drop below a critical level (and none of us know what that is), film is gone.

The answer to question 2. is only a function of the interests of present and future experimental minded photographers. As long as people care enough to experiment and make their own emulsions, AgX photography will survive.