Intersting - let's hope many people dump their outdated 5d3 and crop cameras so they become available for the rest of us :-> ... with the advanced metering and crop mode, I'm sure Canon will have problems producing enough of these for the upcoming demand.
This are the specs that are actually interesting (apart from the missing dual pixel af in the list)
* Continuous shooting 5 frames / sec.
* High precision 61-point AF
* 150,000 pixel RGB + IR photometry sensor
* 1.3x and 1.6x crop shooting mode