Originally posted by Kunzite Saying about the optical reflex viewfinder that "It needs to go" is disregarding those for whom an optical reflex viewfinder is preferable. It might not be personal, but it's about denying us choice.
Manufacturer's do that all the time
K-mount is a full frame, mirror/prism path by design. Remove the mirror/prism and OVF and you might as well start anew. This allows a shrinking of the form factor, or, inversely, more space to add features like larger batteries to power GPS, wi-fi, in-camera processing, IBIS, tilt/swivel screen, etc.
I still suspect that despite the modest success of the K-01, k-mount will remain a SLR design and the Ricoh GR/GXR replacement line will move into mirrorless.
The "traditional" market for the SLR form factor and performance (think telephoto awesomeness, and art no mirrorless comes even close to achieving) persists and is a stronghold, albeit saturated with some overly bulky designs.
Since the dawn of the roll film format camera makers have been keen to sell you multiple devices for different capture scenarios. I see that trend continuing.