There seems to be a lot of fanboys in this thread... hardware wise how much better really do you feel this is than the 5D mark II besides the DIGIC 5 (which handles the high iso and framerate) and the small increase in MP by the sensor? If you pretend that this camera wasn't from Canon would you still feel the same way?
Yes. First off, Digic5+ is not the only reason for the higher frame rate - the mirror box needs to be stronger and have faster motors, even moreso for the 12 fps of the 1D X.
As stated, MP count isn't necessarily the most important factor, or even an important factor for many. The 21 MP of the 5DII was fine, the 18 MP of the 1D X is fine.
The big improvement, IMO, is the AF system of the 5DIII. It's still not 1D X AF, and as I expected the metering is the 7D's metering system (and 60D, 600D, etc.), not the 100K RGB sensor of the 1D X, and that sensor also assists the AF system.
If the photo is real, i was right abt the dial mode, it was not the lock type from the previous leaked pics and im glad it wasnt !!!
If certainly looks to me like the camera features the same button-lock in the center of the mode dial, as on the 60D (and optional retrofit for the 5DII and 7D). I'm not happy about this 'feature' since anything that slows down a mode change is annoying.
Where is the DOF preview button?
On the opposite side of the lens mount release. Possibly programmable as on the 1D X (although just one and not two).

Personally, I'm really glad they did not add a popup flash. For me, trying to use a TS-E lens on a 7D is an exercise in frustration, because the protrusion of the flash blocks access to the TS controls (even with the smaller knob included for use with crop bodies, and that little knob is even harder to turn).