Interesting "idea" here as others have pointed out. If it comes into mass production and has a frame lever, I might replace my M8. It would match my shooting style, force me to think about exposure like my MPs do and eliminate menus (which I hate.)
Another point that hasn't come up in this thread is the topic of obsolete components. One reason I have not replaced my M8 is that any digital camera one buys is simply not maintainable unless the maker owns the whole production chain.
This basically means digital cameras are expensive for amateurs on a per shot basis. Factoring in the forced hardware and software updates for the computers then is also expensive. When the camera fails at the wrong time and the components are EOL, everything needs upgrading...
So, if Leica can prove to me that they have as many components as possible under their control (maestro, own CMOS, etc.), I might buy another digital camera. For sure, eliminating the screen is eliminating another component that could just go EOL and is wasted on me.
Cheers, John