SaltLakeGuy: Canon lost a LOT of the Photojournalist and Sports photography business when Nikon came out with their D3 and they haven't looked back. I think the 5DMkIII will appeal to mostly those that have had other versions of the 5D, but won't capture the new business for that genre like Nikon will. We'll see but that's my prediction based on what's been going on over the last few years with model changes and progress.
I still see more white lenses at sport events, so there must still be professional sport photographers who think Canon is worth it. I have a 70-200 F4L I. I am happy to keep any Canon DSLR body just to be able to use this lens.
Lester Walas: hmm when the 7d came out, a lot of nikon users were dissing it because it apparently had too many mpixels compared to nikons 12mp apsc sensors. now the d800 comes out with its 36mp sensor and (shock horror) the same ppl are dissing the 1dx/5dmk3 for having too few mpixels.
You are so right, many people could not believe why a DSLR should have more that 12 megapixels. Lots of people complained about the large file sizes of Canon, so is the Nikon files any smaller?
PhotoTrevor: I was hoping for so much more... I have a MkII and this does not seem that revolutionary. This is an evolution at best. The MkII should have had a more advanced AF system to begin with and things like more programmable bracketing shots should be offered as a firmware update to MkII users. I am happy to see that the megapixel count was not raised as I prefer low noise over pixels. What I can't figure out is why Canon in it's infinite wisdom can't put a swivel LCD on there and for a camera that supposedly is being marketed for video. You can put it on a 60D but not on a MkIII. Boo....
Not so long ago, there was a big outcry from some people who could not think why a DSLR should have a video function, let alone a swivel LCD on it. Canon's 60 D certainly prompted Nikon to use it on more of its DLSR's