Too little, too late.
I owned (well, still do) a Zune 80, and I loved my Zune Pass dearly. I canceled it during some financial hard times, and slowly gravitated to relying on music services...
Just like with Office 365, it doesn't support tablets. Any tablets. Also, apparently, 1080p-resolution phones such as the HTC One and Galaxy S4.
The RT has HDMI-out and USB 2.0. By technical limitation, it can't support this docking station's DisplayPort and USB 3.0 needs.
I could be wrong, but I believe the 8.1 preview has to be installed from 8. I don't believe you can install it straight.
The option implies that, if the option is NOT checked, that it therefore hast DIFFERENT scaling levels for each display. Otherwise there would be no option and things would operate as they do now...