The worst thing about shooting video with a DSLR is the physical form factor of the camera. So I’m not quite sure why THIS is a good idea.
I’m sure it’ll make pretty images, but I think it’s time to move away from the DSLR shape and think about the ergonomics of video when creating a new video camera.
On the plus side, this should work with many of the existing DSLR accessories. On the negative side, most of those accessories exist because shooting video with a stills camera, quite frankly, sucks.
We shall see when the camera is released in October!