There seems to be issues with the VirtualBox-Guest Additions virtual graphics OpenGL driver in working with DirectX. The 2nd display on Android complains about GPU driver issues on the Win10 VM Guest. Possibly because the drivers aren't signed. Maybe loading Win10 directly as a raw disk will help with the system responsiveness and SuperDisplay issue. I still have been unable to get Android Devices as 2nd Display Extended Desktop, not mirroring, to work natively on Zorin OS 16.