It is Dutch indeed, he uses Red Dragon and the option to make 3D from two images next to each other, then his LG 3D TV has an option that can make one 3D image from those two screens.
If he had a Windows PC hooked up to his TV, it would have looked right, this is what he said.
Seems not to hard to do, really easy, though you need a TV that can convert two images next to each other to 3D.
My brother just sent me this image as he knows I like the VirtualBoy. I guess if you have to play VB games on an emulator, this would be good way to emulate the VB feeling as well.