The 5DIII was targeted to event and wedding photographers who need clean images at higher ISOs. They won't be upset when this surfaces.
... but still many will because they shelled out $3500 to get the latest gimmick on the block, and the arguably the "clean images at high iso" advantage compared to the 5d2 is minor and the 3d shows a real step forward.
I doubt this. For me at least, it is a clear difference between wants and needs vs benefits (IE Income potential). For me right now, the mk3 kicks major wedding ass. This new megapixel beast would be nice to have for shooting wedding formals, outdoors in bright light. But necessary? No. If your a studio guy, yeah, this camera makes sense. Landscape guys, you bet this makes sense. But for the kind of work I'm doing, its more of a want than a need.
Oh, and btw...the mk2 would never pull down usable images at ISO 12,800 ...and thats more than just a gimmick!
Post of the day right here. Finally someone with some good sense.