I am already running LR 5 on a Win 8.1 tablet.
I prefer to see a 16-32.
I almost click the "Buy" button for a K-5IIs but held off the upgrade from a K-5. Glad I did. I have little reservation not only from the specs but from experience. All of the dslrs from Ds to K-5II have been class leading. The price is even a few hundreds lower than the price I paid for my K-5 3 years ago.
The images and video clips are mediocre at best ... a real disappointment. Showing them did not help promoting the new camera bodies at all.
This is an interesting camera, especially because I really love my K5. It may replace my Kx as the backup body or even become the main body if it has a nice soft shutter. The driving force for me is removal of the mirror box. This camera will stop me from even thinking about the Sony NEX series.