This all. doesn't take into account that different sensors are designed to serve different tasks... In other words, there are only some that think of MF as DSLR replacement. In my view, if I am to use MF only for what a DSLR can do, I may as well use a DSLR and save the money.... But a DSLR, won't provide me with MS, it will have limited use when movements are needed, doesn't offer the modularity as to change finders or screens or backs a traditional MF system offers and doesn't offer the colour accuracy needed for repro work... That's why I'm stuck with C645 and Fuji GX680 or others with Mamyia RZ or Hassy-V or Rollei, or are blaming Hasselblad for "closing" the H system... (which they now seem to try and open back bit by bit).
One may easily notice that in industry the larger the sensor the larger the pixels, in other words, pixel density is tighter the smaller the area, there is a good explanation for this since a sensor receives photons not only on its centre but on the edges and corners too and of course, these edge pixels must perform up to a level and the entrance angle increases with larger formats... let alone if lens movements come into the equation...
As a result one has to understand Leica-S positioning into the market and link it with their decisions... For people that upgrade from DSLR just to improve their IQ in common DSLR use, it does exactly that, for people with MF that want to keep their systems and only want to upgrade their back and abandon their DSLR system altogether thus shrinking the equipment needed while increase quality at the same time... it does exactly that.. For those that want to upgrade their MFDBs or want to use a camera with movements, they now own Sinar and Leica has their MFDBs to consider too...
Clearly, the camera provides a link that one may consider if he wants to both replace his DSLR system altogether and integrate it into his MF system keeping the rest of it... That's why the adapters! ....and of course it is sensible for them to decide on a sensor that would provide ONE base to serve all they are planning... a sensor base that will be able to cope with m, S or Sinar... It's simple isn't it? It really is! I believe we'll be surprised with the quality of their sensor in four months time when it will be introduced! I believe High ISO performance will exceed anything we are used up to now, but it will also perform very well on a Leica-P3 view camera and colour accuracy and DR will be right at the top as one would expect from a similarly priced MFDB... I also expect great LV performance and a new Sinarback based on the same sensor technology soon...