>But I guess that at least BVision and Cvision will be supported...
Sure it are :-)
G-Rex support is a matter of not having documentation for,
BTW, G-Rex has been discontinued by DCE so...
As for AmigaOS 4 natives softwares it will run on any Amiga able to run AmigaOS4 : Amiga Classic with PPC cards CyberStorms AND Blizzard PPC, with or without PCI expansion, and already uses CyberVison and BlizzardVision PPC cards or AmigaONEs series.
All you have to do is programming that AOS4 softwares in a clean way, as ALL Amiga software MUST ever be programmed :-)