FaceID shows the difference between Apple and other smartphone manufacturers. Apple doesn't release features until they are absolutely sure they can engineer them to work perfectly.
Of course I don't. But the presentation gives enough information to be able to assume it is secure. Some other manufacturers' solutions can be tricked with photos. Since Apple mentioned dot projector, you can assume they are tracking the 3D model of your face which by itself should be much more secure. And it works with Apple Pay, the banks wouldn't allow it if it wasn't equivalent to Touch ID.
So windows Hello, which also uses 3D models, has been available for years.
As to banks, I'm fairly sure (although I have no inside knowledge) that the banks won't have been allowed to review this technology in advance of the release, so they have no real assurance here.
You can of course assume it's secure and as usuable as TouchID, but I'm guessing the devil will be in the detail on this one.
