Originally posted by Sandy Hancock No. Seriously. You're dreaming. This is nothing to do with technological advancements, but basic aesthetic reality vs market forces.
It's also got to do with the fact that yes, the OP's photoshopped portrait-oriented sensor still fits within the image circle of the K mount, but because of the way the internals are packaged around the sensor and also the rear screen, it would require a complete redesign of almost everything to do with the camera. It`s not just as simple as rotating the sensor. You need to reprogram the rotated SR system to behave appropriately for a start, and that's more of a headache than you might give it credit for. Among other things, I'm pretty sure that swinging the sensor around 90 degrees gives different inertial responses in the various planes of motion, which might require a complete redesign of the entire system, mechanical as well as electronic control.