Thunderstruck, a long-time Virtual Boy coder from PlanetVB forums, has released an open-source Vectrex emulator that runs on the Nintendo Virtual Boy. It currently runs Minestorm only, and very slowly. The author is hoping that another coder will come in and do the “boring” work of optimizing and improving it. Details on how it was accomplished are here.
Vectrex is a good candidate for the Virtual Boy, since it is monochrome and uses wireframe vector graphics, and the stereoscopic 3D effect would be a great addition. Hopefully someone will step in and finish this, and perhaps the same skilled coder could improve the Virtual Boy Game Boy Emulator, which is one of the coolest projects in the history of video gaming in my opinion.