I see the D4 as a Pro's low light speed type camera. I see the D800 and D800e as a Pro's studio and landscape type camera. I also think Nikon will bring out an enthusiasts FX camera that will combine some of the D4 and D800 features in about 6 months time. So that said I am going to wait and see as I have no need for the D4 or D800. In the meantime I will continue to use and enjoy the cameras I have as they meet all of my requirements perfectly.