One of the things I see as we've been going through helping people move to an e-passport is that once you have e-passports, you place the passport on the reader and take the picture, and you have confirmed the identity. Then when I'm coming across the border, you don't have to ask me all these skill-testing questions to see if I really am the person I am. I've proven it.
I think I'd be happier, as a person, if I just did that and were able to go through. It leads, then, to automating the border such that low-risk passengers and travellers can go through the border easily, without even going through a staff location.
If you looked at biometrics for everybody, you'd want to do it so that it was facilitating and speeding up the process rather than for a security point of view. Those are the two things we end up doing with biometrics: facilitation and enhancing security. You get both.