The future of the 6D line

An appropriate price for the feature set. After reading the D600 specs and looking at the body design pages, I'd say the 6D is already behind the curve. I don't mind the 20 megapixels, but if I have to buy SD cards to use a 6D, there needs to be a compelling reason. I don't see one. I'm not the target market for this camera though, so what I think don't mean doodly.