I'll just add that having used a friend's 1DX2 on a shoot last week, the latest iteration Canon PDAF using liveview/touch screen is absolutely epic.
I was doing continuous autofocus on a moving subject with a 70-200 mm lens, locking onto her face in an instant when I tapped the screen, and keeping it in focus as she moved around the frame, only starting to hunt when she left frame.
And being PDAF using the image sensor, there's no need for AF microadjustment- and back or front focus issues with lenses goes away, because it is focussing on the actual image plane in real time.
It was better than me with a follow focus rig, for sure. And it is useable in stills mode using live view.
I gather the 5D Mark IV has the same tech. With that plus Canon skin tones and promised improved dynamic range, I'll be checking it out.
5D cameras are always great all-rounders.
Cheers, Hywel