I've read that they should continue to work seamlessly; such apps make a call to a generic authentication process that, in the case of the X, is FaceID and on earlier phones is TouchID. Let's hope that's the case.One big question for me is... with current 3rd-party apps that use TouchID for authentication, will FaceID simply replace it without needing an update? Or are we going to have to wait months to years for everyone to release FaceID capable apps that previously had TouchID ability? That's going to be annoying, if so. I got so used to logging into so many of my regular apps using TouchID. Does anyone know??