I'm no expert here, but I happen to think that on the video front, the D4's AF abilities will be a greater advantage than all this uncompressed video-out stuff. Here is my logic: the market for the 1D X's video features is primarily from photojournalists that need a video capable camera for mixed media reporting. These people are (like myself) less interested in the technicalities of cinematography and more concerned about the ease with which they can shoot a video for consumption on their news outlet's website. AF in video would be a boon to these people, as it's one less new skill for them learn.
For the people out there who are looking for a cheap, large sensor video camera for indie movie production, I think that Canon's new video-DSLR will be more tailored to their requirements.
+1 well said. I totally agree with you.
1DX, 24mm f1.4L II, 35mm f1.4L, 50mm f1.2L, 85mm f1.2L II, 135mm f2L, 24-70mm f2.8L II, 70-200mm f2.8L IS II : D800, D4, and a whole bunch of Nikon lenses