Digital photography

But as far as video resolution and quality are concerned, are they more or less the same on the 60D as with the 5DM2? Is it just the depth of field which is different?

My 5DmkII and 550D produce reasonably similar footage, the depth of field issue is not as important as people make out as the 550D can produce a very shallow depth of field, certainly as much as you might want for film (moving images) - a fast f/1.2 lens on a longish focal length on a 550D will give you a ridiculously shallow depth of field.