The Virtual Boy probably doesn't deserve to be ranked as one of the ugliest pieces of machinery of all time, but it does bear a striking resemblance to certain sci-fi characters.

The Neoprene eyepiece completely encompassed the player's field of vision. This not only isolated the player from the rest of the world, but prevented anyone else from seeing what the player was doing.

If only the Virtual Boy could play "other" content...

Games such as Mario's Tennis support the use of the Extension port on the underside of the Virtual Boy. Regrettably, Nintendo never got around to releasing an appropriate cable.