If the trend doesn't change, there will be less money for R&D, particularly with companies like Panasonic, Sony and Samsung where camera sales represent a tiny fraction of what they do. They are responsible towards their shareholders, and if they continue to pump money into a division that gives little in return, those in charge will be axed, together with their cameras. For companies like Fuji, Nikon and Olympus, it looks differently, since cameras are, and have always been, their core business. Canon and Ricoh/Pentax is in a different division entirely, since they are optical companies with a big portfolio in office automation and other businesses.
What also puzzles me is what catches on and what doesn't. When Fuji came up with the, in my view great, hybrid viewfinder, I thought "WOW"... this is something that we will see in all cameras soon. But no, it's been introduced to two Fuji bodies so far, and one isn't even a current model. Which forces the question: Are consumers a bit tired of innovation, tired of having to relate to new ways of doing things every few months?
They do buy new mobile phones all the time of course, but in spite of all the hype, they don't really change much. iOS is still iOS and Android is still Android. I don't think it matters much if it's called Banana Split with Crispy Nuts or Angel from a Newborn Star. People's needs don't really change much from one year to another, and I'm quite sure that most use their iPhone 6 more or less the same way as they used their iPhone Neanderthal.
Like me. Apart from shooting some video (but much less than I planned or anticipated) I use the D810 exactly the same way as I used the D80, or the GH3 for that matter. Somebody inserted a "1" between the "8" and the "0", and the image quality has improved somewhat, but I still take the same photos that I would have taken with the older camera.
So maybe I don't worry so much about innovation. If a couple of D80 bodies were all I had to use for the rest of my life, that wouldn't really bother me much, at least if there were no better alternatives around. I did use my OM-1 for 30 years too. What I do find worrying is that some of the large electronics giant might pull out of the camera industry to concentrate on hybrid products, like phones and other consumer products with higher profit margins. That would mean less choice, less exposure to the market and thereby less interest among consumers. I believe there's a real danger that cameras in general will end up where film and vinyl is now, except for professional use. Within ten years possibly.
Does it matter? Probably not, at least not for humanity as a whole, but the broad appeal of photography as a hobby would become extinct. I can already hear the little kids shouting "Look daddy! That man has a black box in front of his face!"