Nothing scary about it. As long as there is demand, there will be offer. Current film situation proves it. When the digital era started, film demand dropped; now that there is a new interest (and demand) on film, production started again (obviously not in its previous volume, but a volume to suit the market).
Same with digital cameras. Demand is dropping due to cell phones taking its place (the same than when digital camera took the place of film cameras). If, on the future, there is a resurgence on digital cameras, there will be someone that will make them, because there will be a suitable market for them.
If there is not a market in the future for them, it means that they aren't missed that much 🙂.
We are living on a global economy. If, say, 1% of people of the world is interested on cameras, on a global scale, that's a lot of people 🙂
Regards
Marcelo