The D700 split into two different cameras: the D800 and D600.
Yeah i guess, but I'm betting most d700 shooters would have preferred a d700s: 7fps, 24mp, solid build.
What they got was either: pretty much the same camera [d600] with lesser build quality but good amount of mp.
Or a complete beast [d800] whilst great for certain users, it's a step backward in fps and too large file size for others.
For sports, event, wedding or wildlife photographers already using a d700, I wouldn't consider either of these a great upgrade. Maybe the d600 for a 'slightly' faster shooting speed and more mp but then you lose the tank like build that the d700 was known for.
And yes, i agree the d7100 isn't a replacement for the d300s but its hard not to see that whilst nikons recent release's are great cameras, they don't seem to offer much to the existing semipro d700 d300s crowd. They seem more aimed at increasing the user base.