Watched a couple of Canon videos. One cool feature is that you can use the back LCD, while off, to move the focus while looking thru the EVF.
You can also customize pretty much any button, including the new touch multi-function. And the filter adapter is compatible with EF/EF-S lenses. Speaking of EF-S, it becomes a crop when used.
So far this looks very promising. Can't wait for some real-world previews and reviews.