If this is primarily going to be a video camera, wouldn't it make more sense to use the C300 body instead of the 1DX?
The c300 and all "video" bodies are stupid.
5D2 taught us that.
GH2 body would be perfect if the buttons weren't crap. Add dials, weatherproofing, battery.
The lighter/smaller the bodies go, ohhh the places you'll go.
The camera is merely a storytelling element, and the increasing opportunity to put it in motion pushes the limit.
XLR is useless without a great preamp.
If they continue to ignore movie AF possibilites... They're idiots.
Make it hunt slowly, in a unified direction (not hunting all over the place).
Use AF button to lock on the subject for the duration of recording (doesn't the iPhone have this??)
Or... How certain long L's have the focus recall, set multiple focus pts you can cycle between.
At the very least, they MUST combine face recognition with the digital zoom WHILE recording.
They wont. Idiots.