Nintendo Is Developing a Non-Wearable to Track Sleep and Fatigue. Nintendo must be pulling our legs. The newest device in its plans is a box that sits on the bedside table, and uses microwaves to track our sleep patterns. Say what? Why not just stick your head in a microwave oven and get it over with? I don't wear wearables to bed, as they tend to vibrate at 1 A.M., when I am finally in deep REM sleep. Why would I want a microwave transmitter next to my head? Nintendo, go back to making games with little cartoon characters. I need some sleep.