Sure it’s nearly the size of a Gameboy, but this homemade Pong watch is pretty pimp. It appears to just play with itself endlessly, but I imagine it could be somewhat entrancing when you should probably be doing more important things.
It uses a 10mm case with a 96×64 OLED dsplay. Oh and battery life is just 25 hours so it might not be hospitable for late nights.
Homemade Pong watch! [Make]