It so obvious from reading these comments that the 5D3 need to be SPLIT into a regular edition with some video, and a optimized video edition. People can't really seem to meet in the middle. It's like Democrats and Republicans.
Think of it this way. A video editor and a 3D animator both buy the newest Macintosh. The video guy is probably going to buy a graphics card optimized for video and video capture and export (very expensive cards). The 3D guy is probably going to buy a graphics card that is optimized for 3D. The same computer, but optimized for different disciplines. It's really no different with cameras.
A big part of why the 5D2 was so successful was because of the video. I work in TV in LA, and everyone I know (and there are many), bought the 5D / 7D mainly for the video.
The market is evolving, and Canon needs to change with it.
Still photographers don't want the video and Video people don't need a huge mega-pixel count because it causes aliasing and line-skipping. As a video guy, I would be happy to have a 5d3 that took great video and good stills, but I don't need a 30 mega pixel image. That's way over kill for me. The opposite probably applies to a Still photographer.
As for the argument of "just go buy a video camera," that is such and OLD and DATED way of looking at things. That just sounds like something my Dad would say. Look at the new RED Epic, it's pretty small and not like a convential video camera. Try shooting cameras like the Red or the Panasonic AF 101 handheld. It doesn't work very well as it always needs some type of support because the size and ergonomic are terrible for hand held.
The small size of the DSLR's are it greatest strength. If you wanted to, you can use a cage and attache a monitor, a good mic to a good recorder, a matte box, a different handle, etc.... But if you want it just the bare basic camera for those stealth Subway shots in Black Swan, it's good for that too. It's as big as you want and as small as you want. Something that just CANNOT be done with current video cameras that are huge and have everything built in.
The DSLRs have their place in video for sure, especially when you need a small, portable camera which is great if you are shooting solo or with a small crew. James Cameron said in a recent interview that he's shooting an entire feature using 5Ds. So yeah, DSLR video is here to stay.
I think the Red Epic and the Scarlet and the DSLRs, all small cameras, are the way of the future. Who wants to film with a giant video camera when you can eventually have something that would do the same thing, but fits in one hand? I certainly don't.
But it's obvious that Canon cannot make both camps happy, so they should just do 2 versions of the 5d3.