On a serious note; One has already provided their personal details to purchase the ticket, then to receive their bording pass, then presenting their ID to pass through securit - and soon, to provide their "realID" BS which requires a bunch more hoops-to-jump-through-to-obtain, and now in addition to all of this, WHAT exactly is facial recognition/retinal scanning going to do?

I would argue that if they are going to use facial recognition/retinal scanning - then I shouldnt be stopped, searched or require ANY paper document to do anything and should be able to just walk through access-portals for which my ID can be tied to my ticket-of-passage....