This rumour is pretty awesome….
There is speculation that Microsoft is considering “Support for facial recognition as one of the ways identity management/log in will be handled”.
So potentially, you could have your camera on all the time and when you show up in front of your PC, it logs in automatically.
When you leave the camera view for a certain amount of time, it would lock the PC.
That would be something futuristic that is definitely possible to implement right now.
Tougher questions are: What happens if you gain or lose weight and dont look like your baseline photograph anymore…