Yeah the fact that this already exists and it is pretty much perfect just makes me think that it is a lame move from Nintendo, even if it was meant to be a joke lol.
There's also an emulator for the oculus quest, the moment you launch a game you understand why it wasn't that successful and why VR was abandoned for a while.
Monochrome games are all good and fun when the screen is not a few cm from your eyes and that's the only color you can see hahahah
If you have homebrew on your 3DS, you can install an experimental Virtual Boy emulator. The dev abandoned the project quite early, so it's just a single build with bad performance, but 3D works and it's quite literally the best and only way to truly preserve the experience of playing a Virtual Boy.