As long as there is a 5d series at half price, the advanced amateur, indie film maker and even professional photographer will buy the $3,800 camera over the $6,900 camera in rations of a trillion to 1.
At first I liked the idea of the 1dx, but once you look into the specs for video you need better sound sampling/mixing, more than one sound channel and cough, choke, cough, even face tracking autofocus and a raw or semi raw 4k file.
Then 6 grand makes more sense.
For stills I don't, probably never will need anything past 20 mpx., and for stills the 5d series is off the wall good. The camera may be as bland as the Kardashian's latest press release announcing their recent pedicure, but it still is a heck of a deal in the world of digital cameras.