I'm a bit disappointed by this truth-be told. When I first heard about the S2, I was hoping for something more inline with the original S1. Not a tethered studio camera, but a dSLR that could use a collection of first and third-party lenses, (new) S-mount, R, M, Canon, Nikon all using adapters. With a 'bigger than 35mm' sensor, software could have cropped the sensor for optimisation with any given lense, with the AF disabled for all but the S-mount lenses.
As it is, it looks like a lovely camera, but too close to the existing Hasselblads, Leafs etc...