I would like to be (and stay) more optimistic about the hobby in that yes, it's a gold age for some of us older builders, but I think the hobby will survive because people will always look for ways of entertaining themselves that has nothing to do with new technologies. Geez, television was a new technology not so long ago, right?
Model building parents need to continue to expose their children to the beauties of building model cars. Or models, period. It doesn't have to be cars. As long as people are building models, model cars will be around as a subject matter.