This is the right question. It’s a great technology but was it needed. It’s inventing a space pen when a pencil would have been fine. Only if Face ID leads to some sort of augmented reality projection of your face etc. but I don’t think this technology is there yet. If the true depth camera system is only a way of authenticating then there was no need for such a system which led to that ugly notch. I love Apple but some decisions like the touch bar on Mac and now Face ID don’t seem completely thought out. I know Face ID is here to stay at least for the next 2-3 generations but if there aren’t more applications for it then this was just a forced technology. Some times it would be good if Apple execs really gave non cryptic interviews of the vision of a product.
Touch ID is fine for security. I don’t doubt that Face ID is also very secure, but it still seems to me that Touch ID is quicker, easier and more convenient. Face ID seems to be a solution to something that’s not a problem.