@Mihuel
"Because the manufacturers know the Achilles heel of customers. Everyone wants to have a longer dick than his neighbor. The numbers, even if they do not understand, act on the human psyche."

This is so true. I remember having an argument with a guy at a party once and he didn't believe me that 720p is better than 1080i. He couldn't comprehend the fact that with 1080i he is actually watching 540 lines at a time where as in 720p you are getting the full 720 lines at a time. He was sold on the fact that 1080 is a bigger number than 720 is so it must be better. I had to walk away from the conversation laughing.

Dan Chung has a very informative Video on the 1DX on his site:

http://www.dslrnewsshooter.com/

Mitch of Planet 5D made this list of points of interest from the video:

* No line skipping in video – uses whole sensor (4:50)
* Very little rolling shutter (5:00)
* No clean output but there’s no blackout and no frame rate drop either (6:10)
* Still a division between HDSLRs and the video cameras with HDMI out (6:25)
* Some samples of the new menus and audio controls (7:05)
* Display of audio levels and using silent controls (7:25)
* Can use shutter button to start/stop movie recording (and use remote controls) (9:00)
* Time code options (9:40)
* New dedicated button for magnifying image (10:45)

Few samples

http://www.photographyblog.com/previews/canon_eos_1d_x_photos/