Why can't anyone actually read Craig's posts, instead of just skimming the attention grabber headline and jumping to conclusions? Nothing in the post about an EOS-1 style body. Nothing.
...if you were new to the pro market it's a tough choice between the D800 and the 5D3. I guess one lends itself to the wedding market and the other to the landscape market ...
You hit the nail on the head. Now ask yourself this: what do you think the ratio of professional wedding photographers is to professional landscape photographers – 1,000 to 1? 10,000 to 1? How many professional wedding photographers are there in your city? Now compare that to the number of persons who actually earn a living in landscape photography.
Canon targeted the 5DIII to a very specific professional market. It is about the only large professional photography market remaining. It is a market that is highly competitive and the practitioners cannot afford to let their competitor down the street gain a technological edge. As with almost everything in life, it's not the best technology that wins...it is the best technology that meets a market need that wins.
In contrast the D800 is a very nice high resolution camera, but there is no large, clearly defined professional audience. Right now the D800 is selling very well to meet pent up demand from Nikon shooters. But once that demand is met, will they be able to sustain the market? Not so sure. On the other hand, eventually almost every wedding photographer in the world will end up buying a 5DIII because they need to edge that its high ISO performance gives them when shooting. (Unless of course they go for the 1D-X, with even better high ISO performance.)