Originally posted by pathdoc You could go further than that. No top LCD, all the info in the viewfinder, micro SD card to save space, analogue control knobs... in short, an MX-D or K1000-D, but with a superior viewfinder presentation.
If you want a superior viewfinder, drop the AF. Then you can have it.
As for the smartphone thing: It would be an ADDITION to the regular screen. For example when you put the camera in a place where you can't see the screen. Or when you want to review the images on a higher quality screen. Or perhaps even put it into Google Cardboard and put that onto your head. It would be quite trippy, but who knows, maybe useful.
You could mount the camera onto a car, and control it from inside. Or be inside a studio, the camera mounted on the tripod, and you're with the model, telling him or her how to pose and being able to show the result instantly. And on and on and on. Lots of possibilities. But no one is going to take away your screen on the back of the camera. That would be stupid.
To avoid scratches Pentax could be using glass. It's not like you are going to drop your camera... and those that do can put on a glass screen protector. I have one on my phone, and it has saved my screen twice now.