I'd love official support, even if AstroPad will continue to improve.For now there's AstroPad, but yeah official support would be good. Kinda surprised the AstroPad guys haven't done a virtual screen driver (like Duet or AirDisplay or whatever) to provide a second screen function while they're at it.
I'm not kidding when I say I prefer what I've tried of the Pencil compared to a Cintiq.