The rear screen looks fairly similar to the GRiii one, just rotated 180 degrees.
There appears to be a small gap around the screen of the K? that is definitely not there on the GRiii. (Or my nearest comparison - K5)
I would be very happy if this an update of the K1 'moonlander' design with a neater frame...
The OVF/LV/Video selector seems to be derived from the KP selector that was coaxially under the 3rd wheel mode selector. With no rotary mode selector for the 3rd wheel, the OVF/LV/Video selector has risen to the top.
As has been suggested by others here, the top left LV selector button of the KP and K1 may have gained a new role of releasing the screen.
Looking forward to the K? release!!!