I had no intentions of writing about this camera, but someone asked what my thoughts are on it. So what do I think of the Nikon D4S? It's the same camera as the Nikon D4.
The differences between the Nikon D4 and the Nikon D4S are so minor that Nikon could (for the most part) turn everyone's D4 into a D4S with a firmware update. There is nothing revolutionary here.
The D4S, along with the D4 and the Df, which all share the same exceptional 16 megapixel full-frame sensor, are kings of high ISO. The D4S is very fast, too, making it ideal for sports photography.
The good news is that the D4 should soon sell for less now that the D4S has been announced. Wait until next year when the D5 is announced, and the price will drop even more.