Biometric guns, eh??
I vote no. It's a nice thought, but what if your palm is sweaty when you need to fire in self-defense? What if your wife or GF needs to use the gun to chase away a burglar or something while you are not around, and she is not coded to use the pistol? What if you cut or burn your hand or have some kind of rash or skin problem for some reason? What if you just want to resell the gun to another law-abiding person, because you need the money or feel that you no longer need it?
Biometrics are useful, but would I potentially bet my life on them working correctly? No, I wouldn't.