There's a few scenarios/problems I see with this new FaceID.
1. Say I am in a meeting and I need to check a text message and I want to unlock my phone under my desk to glance at the message, this will now be WAY more obvious to my meeting guests. Hold On! I need to hold my phone up to my face.. That's going to be weird.
2. Let's say I am driving, wearing sun-glasses. Face ID isn't going to work that way either. Facial recognition doesn't work with sun-glasses. So I will be more distracted in my car.
3. Your friend could grab your phone, hold it up to your face and open your phone.
4. Also another issue, non-faceid related: Having a case on your phone, it seems like you won't be able to use the wireless charging?
5. They also didn't talk about how secure this biometric data is. Is it sent in any-way to apple. Can the CIA access the data? etc. I think they should have touched on that in the demo