I've done my share of D800 humping lately, but a 22 mp 5DIII with a 61-point AF system and 6.9 FPS would be one heck of a camera. Throw in one or two additional stops of DR and ISO over the 5DII, and this sucker will be irresistible. Do it, Canon
My Canon glass gives me wood every time I use them, and I really don't want to switch systems.
The interesting thing about a 22MP 5DIII is that once again the budget full frame is divided by two completely opposite camera models that essentially swapped places compared to the last generation. Nikon is now big MP game and a landscape/studio dream, canon is now fast fps game which should keep a lot of action/sports guys happy.
The funny part is that despite the role reversals, both the Canon and Nikon fan boys are still waving their Canon and Nikon flags. If you're a Nikon fan boy that loved the D700, and gladly sacrificed resolution for FPS and ISO, it would seem odd to embrace the D800, but they do anyways. If you're a Canon fan boy that went poo poo on speed in favor of resolution, it would seem odd to embrace a 22 mp 5DIII with vastly improved AF and FPS, but they will anyways.