Thought I should revise my previous post on this beastly camera, which was addle-brained and pointless.
Some points of interest: the camera only adds 1 megapixel to the count of its predecessor. This sets a good precedent that is arguably happening across the dSLR industry -- a move away from MPs as the ultimate benchmark of performance and a focus on the fundamental quality of the image. This move also offers a clear contrast with Nikon, Canon's biggest competitor in this space, who is pursuing a different strategy with their product lines.
The camera also finally offers 50 and 60 frames-per-second video capability, albeit at a reduced resolution of 720p. This feature has been available on a number of lower-end Canon cameras for quite some time; its a nice / needed upgrade here.
Lastly, the price has been upgraded. $3500 at Amazon. Assume it will come down with time - but that's a lot of money.
Camera Labs sums up the reason photographers and gadget-geeks are excited pretty nicely:
The headline specifications are a new 22.3 Megapixel full-frame sensor with 100-25600 ISO sensitivity (expandable to 102,400 ISO), 1080p video at 24, 25 or 30fps and 720p at 50 or 60fps, a 61-point AF system (with 41 cross-type sensors), 6fps continuous shooting, a viewfinder with 100% coverage, 3.2in screen with 1040k resolution, 63-zone iCFL metering, three, five or seven frame bracketing, a new three-frame HDR mode, microphone and headphone jacks and twin memory card slots, one for Compact Flash, the other for SD; the control layout has also been adjusted and the build slightly improved. So while the resolution and video specs remain similar to its predecessor, the continuous shooting speed, AF system, viewfinder, screen and build are all improved, and again there's the bonus of twin card slots.