I don't think this camera will be a phenomenon success for Sony, as it does not natively record 4K, and the pixel count is too low for many people. But it addresses many enthusiast's need for a small camera with the highest image quality and exposure latitude, without the insane high megapixels. This is my kind of camera. I have been waiting for a camera like this since the Canon 5D classic. With today's technology, a 12MP full frame sensor should have mind boggling low light capabilities with high dynamic range. The low pixel count will much easier on old lenses too, which is very important to me, having so much old stuff.
If the price of the A7s is the same as the A7, or, hopefully lower, this will be my camera. It iwll last me for many years, seriously.
Roof top - S.F.O.M 100mm f3.2 Projection Lens & Olympus E-M5