Biometrics are not secrets (it must be assumed that attackers always possess all biometric data), but they can nevertheless be a good form of authentication when combined with situational awareness. If you try to use one of these hot glued fingerprints in front of a security guard, it isn't going to go well for you.

At the moment, humans are still necessary for situational awareness, but probably machines can get there pretty soon. A phone, for example, that monitors its surroundings continuously and has enough intelligence to reliably distinguish normal access by its owner from duress or the presentation of fake biometrics seems like it's within reach of current technology (though it doesn't actually exist).