I've been enjoying 3 focus points on MFDB since 1999.
I don't think you understand the functionality of the new Sinar software.
This is not about three focus points in the viewfinder.
This is three focus points in live view that can be positioned freely in order to achieve fine focus
when using tilt shift with a tethered camera.
I suggested this many times. I have also discussed doing this with the D800 with Nikon both in camera and with software.
In studio with a Nikon I use a large HDMI monitor and live view to shoot shallow depth of field with tilt shift.
it's disgustingly luxurious to do this compared to how I do it with my 8x10 film cameras.
I just bought a Canon 85mm 1.2 that was broken for pennies and tore it apart and built it into the front end of a Fuji gx680 that I will be using on my d800
so I can tilt shift. For focus control really, no perspective control due to the limits of the image circle.
Early "design stages"
What is cool is that the front end of the Fuji gx680 is really easy to remove.
Just these two screws here.
The base to mount the Nikon is easy too. you just need one of these and a block of billet aluminum.
Then you need to modify one of these wide angle bellows by Fuji for the Fuji gx680.