I love the idea of pixel shift, but I don't see a practical use. With a sensor putting out 36 megapixels, why do you need a higher res photo? Unless your printing billboards, that is.
I guess Sony realized this when they put the gimped version on their bodies, lol. Perhaps it's for those who wish they had a medium format camera for landscapes. I use it on my K70 and KP from time to time though- it really does work great in the right situation.