Well, let's just say that there is a market for it, whether you agree or not. It doesn't necessarily have to be called a 5D; it could be a 3D or 4D or 2D or whatever.
--
Whoever said 'a picture is worth a thousand words' was a cheapskate.
http://www.pbase.com/dot_borg
http://www.modelmayhem.com/dotborg
Thats a completely different assertation to your original one.
You claimed the 5DII should have been the 'full frame' 7D.
As I pointed out, that is entirely wrong. the 5D to 5D II is exactly what one should expect from one iteration to the next, the same basic design philosphy using the current tech available.
Now , if you are saying Canon should make a full frame 7D , then yes, not only should they, its highly likely they will at some point.
It wont be called 5D though. Canon never change the basic ethos of a camera line, they never have, they never will. An XXD will always be a reasonably well built jack of all trades prosumer camera, this is why the 7D is just that, a new line, the 60D will still come, and will be the 50D with video etc. The 5D will always be a great sensor in an XXD body, and any major improvements to framerates/AF etc that alter its designed functionality will simply mean a new product line. The fabled 3D.
(In film terms , this would be the transition from the Eos 5 to the Eos 3)
It wont match the 7D in framerate, and it wont match the 5D in pixel density though, and will likely be more expensive than either.
To get the best of the 7D and 5D in a single body you will have to buy a 1 series, and that will never change for the forseeable future. Its simply Canons basic business strategy.
Im not saying its right, I'm rather saying this is how Canon has operated for as long as I have owned them (my first eos purchase was a brand new Eos 5 film camera, many years ago) , and convincing yourself it will change to suit what you want can only ever lead to dissapointment.
I currently shoot a 5D, 40D and Eos 3.
they all have strengths and weaknesses, and all are more capable image makers than the person holding them.
The 40D will be replaced by a 7D.
Eventually my Eos 3 will be replaced by a digital body with similar capability, I suspect the 7D will be at the end of its production cycle before that happens.
I would prefer it sooner, by realistically its not going to happen.