Japan had a way cooler version of the virtual boy.
“Famicom 3D System (ファミコン3Dシステム) is an accessory for the Family Computer that was only released in Japan in 1986. The 3D system consisted of a pair of liquid crystal shutter glasses that received video signals through dual 3.5mm jacks on a special adapter. It gave compatible games the illusion of 3D depth, like the Sega Master System’s 3D glasses. With the exception of Falsion, games would play in conventional 2D until a “3D mode” was activated by use of the select button.” (Via Wikipedia)