Since Luna is fully funded (with my help ) I can now share the way I’ve been using Astropad for months now.
I bought a display emulator. Its basically a hdmi connector, that fools the hardware into thinking a display is connected - therefore you can use this screen with Astropad. This is exactly what Luna will do and it’s still hardware accelerated, works wireless and of course no black borders.
Luna will obviously have some kind of software to change the resolution and display automatically - but you only have to do it once manually with this hdmi connector. Changing Astropad to the second screen is a little bit tricky but it works perfectly.
If you guys have questions - go ahead.
Heres an Amazon Link:
So for those of you, who don’t want to wait until may 2018 - just try it out and its cheap.