>I've said it before and I'll say it again. The D800 may be a >great new body and many will love it but many people >(including myself) who were expecting a D700 replacement , >will be left scratching their heads. I, for one, wanted an >improved D700. This is a completely different animal. If you >were shooting a D3s, the D4 is an obvious upgrade. If you were >shooting a D700, the D800 is not at all.
It depends on what you consider the most important.
I think that Nikon decided that ISO 6400 is all that is needed on the D700 replacememt, and that's what the D800 has. The areas they targeted for improvement were resolution, video, and focus. Those areas are obvious improvements over the D700.
I was going to upgrade from my D3 to a D4, mostly for the resolution increase and not the noise improvement. However, the D800 has double the resolution of the D4 with better focusing and equal high ISO performance. That sold me on it for my portrait and wedding business.