I'm wondering if this will trickle into unlock screens and profile logins, I can only see that being highly frustrating. I have little faith in biometrics and c

I'm wondering if this will trickle into unlock screens and profile logins, I can only see that being highly frustrating. I have little faith in biometrics and can just imagine that not being able to log in due to having your angry face on can only become a viscous circle of lockout. Then again, if you can teach it your intoxicated face then you could have a phone version of gmail's mail goggles. On a more serious note, can anyone give me a practical non entertainment use for facial recognition in an desktop app? With the quality of camera it's likely to be working with in the near future there doesn't seem to be much scope for more than just 'yep, that's a face, here's roughly where the features are'.