Originally posted by Brangdon ... You can either mechanically move the sensor to compensate, or try to undo it in software, but neither of those is "electronic".
If software on your computer can de-blur image shake, then theoretically the camera firmware (which is really software) can be programmed do the same thing. We may have to wait few years before cameras have enough processing power to accomplish that but it could be a 100% electronic solution.
Originally posted by gazonk Instead of moving the sensor, you can shift which sensor pixel that records the data for each pixel of the final image.
Gazonk, I think you missed what Brangdon was trying to say (or maybe I missed it). For single exposure shake reduction, something (either the sensor or lens) has to mechanically move in order to stabilize the image. Imagine 2 adjacent pixels on the sensor. The camera is aimed so one pixel is recording black while the other is recording white. If the camera shakes so that both pixels record a grayish mix, electronics might not be able to undo that for a single exposure.
Perhaps a future Pentax camera will capture everything as high res video, then stack multiple frames into an even higher quality combined single exposure; HDR on steroids.