Nintendo has filed a patent for a device that scores one’s sleep quality each day. A user’s weight, pulse and movement information, as well as room temperature and humidity, are gathered. A microphone, camera, thermometer and other sensors calculate a sleep score that will be projected onto the ceiling.
The abstract describes sensors that assess emotions, with out much detail. (The application is written in Japanese.) The challenge is to find a way to use this information to actually improve sleep quality.