Check your own sleep patterns

A company in Japan has created a pillow that detects head movements while you sleep and then reports to you when you wake up whether you've had a good night sleep (less movement = better sleep), or if you need to take a nappy nap later. If you want one you've gotta either fly to Japan in September and pay $392, or find someone to send it to you.
Will drooling cause the pillow to electrocute you? Or perhaps set the house on fire?