I have installed a Discover Pro 8" screen on my Discover Media unit - born with the 6,5" display.
The bigger screen works perfectly.
I was just not so happy with the resolution after I saw the Discover Pro resolution.
After some searches and tests, in the Green Menu, I found out that you could select Skin HIGH, which actually changed the resolution. However your Menu will change to 6x6 instead of the one line Swappable menu. Looks like the latest units - think it is MiB2,5.
You can already see the change in the Phone menu after the "tweak". Below Discover Pro, you have 4 Favorite contacts, while Pro has 6.
So now I have a Discover Media unit with a Discover Pro screen (5G0 919 606) and also the same resolution - AND the 6 Favorit contacts...
Looks like VW already prepared this for us