I always said that ever since Nikon changed the logo to make it look as if it had had one too many, Nikon lost the plot with their cameras, trying to have all bases covered to suit anybody and everybody. They've finally realised that the vast majority of FF users do not want pop up flash, they want sound ergonomics in a sensibly sized quality body, producing the highest possible perceived IQ, and a 16 mp sensor is going to work just great for that. They want a crystal clear OVF with no translucent LCD murking the image up which Nikon have been doing for years, and even Canon joined that game with the 5D3 and 7D. ( Yes wait for the 5D4, it will loose the translucent crap and have interchangeable screens ). If Nikon are talking about 'pure' photography I can't see this camera having a hybrid viewfinder as this must reduce the OVF quality.
Sorry - almost totally disagree.
1) pop-up flash is great. As with many other things, better to have it and not need it than to need it and not have it. The good course is not to remove it, but to enhance it. The RX100 has a tiltable head and even the iPhone 5S has two colors.
2) This camera is aimed exactly at having all bases covered and suit everybody. It will be the real D700 successor, something that D600 and D800 both failed to be. Ironically, something the 5D3 is.
3) I don't know about the 5D3, but the OVF of the D600 is big, bright and very clear. Too clear I would say, to work comfortably in MF at wide apertures. The green dot is unreliable when shooting wider than f/2.8.
4) For the tech level available today, I would say that the 24 MP Sony sensor is the best all-rounder out there. 28 MP would probably be perfect.
Talking about pure photography, to me it means solid build, great all-round sensor, great PDAF, high burst rate, HSS and great strobist options, high compatibility and focus support with MF lenses. Why not, Wi-Fi and GPS.
As of today, I think Sony might be the first to produce such a camera.