I usually don't care about conjecture, but for a long time I thought something was strange with Nikon's offerings.
It's been obvious since the 5d2 that video is a sales offering for professionals and amateurs, whether they use it or not..
But Nikon, unlike Canon, Sony, Panasonic, doesn't have a higher end video/cinema camera market to protect.
Nikon could have added any feature, in fact made the killer combo cam, but they didn't which is kind of strange considering the D90 was the first video capable dslr.
Also Nikon lenses have been used by indie and serious film production forever. I can get a Nikon mount or adapter for almost any cinema camera.
I'm just guessing, but I think this is the problem of having one company (sony) be the digital film for nearly every camera, except Canon, Leica sometimes Panasonic.
Once again, a guess, but Sony has kept their pdaf on sensor focusing for themselves, so maybe there is more than tech or marketing involved, maybe holding the good stuff back will allow Sony to become #2.
I mean why would Nikon offer their d5 with only 3 minutes of motion capture? Nobody can shoot motion footage seriously at 3 minutes and ok, the Nikon does offer pdaf, but nobody talks about the video focusing and the crop is 1.5 which is fairly severe.
I thought I read somewhere that Nikon has a hook up with Samsung, so things could change, but not being at NAB was not a good thing for any camera maker because without a video/cinema/still offering a company is limiting themselves.
I''m basically brand agnostic and I know Canon doesn't get much love on these tech centric forums, but Canon has been pushing a full line up of 4k cameras for a while and though it seems they do the electronic sales thing of limiting features to bump you up a notch Canon seems to be covering as much territory as possible, with the exception of Sony, who seems to be playing with a larger deck of cards than the rest and Canon seems to keep on with their own sensors, though a little slow on the draw when it comes to upgrades.
I just get the feeling that most of this smells of contracts and not technical ability, but hey this is just a guess.http://www.eoshd.com/2016/01/nikon-d5-versus-canon-1d-c-cinematic-4k-video-wins/
P.S. I was at a still camera rental house this week and they were loading up with new equipment. I asked what and was told, "everything has to offer video and very little flash, a lot of continuous light", so maybe that tells us a little bit about the market.
Just a guess.