We held off with this a little in case it was an elaborate April Fool's Day joke. But no, the Classic Arcade Wristwatch at ThinkGeek is real and available to order now.
As you've probably worked out, this is a classic arcade cabinet for your wrist, but it's a watch too, with the 'space rocks' taking the place of hours and minutes on the face, while a spaceship is your seconds hand. On top of that, the 'fire' button lights up the hours on the dial and makes an old school 'pew' sound and the joystick…well, the joystick is just ornamental, but a great talking point regardless.
As for construction, it has a stainless steel case and black leather band, along with a Japanese movement within. $49.99 is the price if you want one.