I think the jury is still out on the whole DSLR video issue. After the Nikon D90 and this 5D II hit the streets...we shall see what they can do.
On one hand, trying to create good video with a still camera and vice versa, hasn't been the best way to go about it. There are probably compromises.
But on the other hand, if the video is pretty good, you now have a video camera that can use Canon lenses and has a full frame sensor. From what I understand of digital video cameras, the sensors are usually quite small, making it hard to get a shallow DOF.