Google has won a face-to-unlock patent that seems to let multiple users share one "computing device." Point your face at the built-in camera, and you'll be allowed access to your personal profile -- and when it's time to move, someone else can do the same to take your place. While there's no connection to a real-world product and relates more to biometric ID than consumer technology, it does tickle hopes that we could see the feature included alongside official multi-user support in a future iteration of Android.