Put another way, it took Nikon two generations to come up with a camera that approaches the 5DIII in overall utility...and I bet the 5DIII outsells the D810 just as it did the D800/E.Errrrrrr I don't think we are talking sales figures here but camera technology. Precisely where does the D810 not exceed a Canon 5DIII? Nikon D810 exceeds the 5DIII in any reasonable comparison. In quality of the sensor it absolutely trounces the Canon. lets not distract the conversation with lens line or spots on the D600 sensor and stick to the comparison between the 5DIII and the D810 bodies. The 5DIII "approaches" the D810 in some respects...but exceeds it in none. BTW I own and love the 5DIII but it is outclassed by the newer D810. Yes, Canon is 2 generations behind, at least on sensors and it doesn't look like that is going to change anytime soon
Same thing one step up – it took Nikon until the D4s to approach the 1D X.