Canon are a bit different they have fingers in other pies in particular the office area and last time I looked over half their profit comes from that division which has nothing to do with camera sales. Nikon managed to pick up a bit end of last year but sales are down. What they are doing is trying to get more profit with higher prices it's not sales driven people are buying less stuff be it bodies/lenses/accessories. Furthermore the China flash makers have really attacked the OEM's they offer models far cheaper that are near enough as good as the premium models. I'd not buy an OEM flash again or a Metz I'm converted now pay less get almost as much.
Damn shame someone in China doesn't have a complete system I'd dump everything in a heartbeat if it were any good.
They'll probably weather it out. Oly has medical interests not really sure what Sony will do with their share it's hard to see two makers on micro 4/3 long term. As for the rest Pentax/Fuji will tick along probably as will A mount with more attention to E mount. I've nothing on my must buy list and I wouldn't have regardless of mount. I just have most of the stuff I need and the bodies are up to what I want them for. Other than burning cash not really much point lashing out new A99II looks nice enough can't justify the price at this time.
There is still money to be made in cameras, just not as much and with less sales. Same applies to lens makers too. It's a combination of factors high growth at the film transition era which was not sustainable. Then the camera phones got a lot better and the camera makers did very little to counter than particularly at the consumer end of the market. Funny thing is there is a bit of an "indie" film revival youngsters playing around with it that have never used it before. I said years ago it would survive as a niche format where most predicted a total death. Doesn't really matter to me what happens with the industry bar the high prices which I won't pay bargain shopping is the way to go