Better privacy for a user. FaceID has the problem that I can't hide it. As soon as I walk somewhere cameras can capture and match my face against their own records, however if I never registered my face ID with Amazon then they will know that I am possibly a recurring customer, but not know who I am. Palm IDs, VeinIDs, etc. are biometrics which I can easily hold back from disclosing. Only when I actively insert or present my finger/hand/palm I allow another device to scan my hand and do a match analysis. This means that I as a user am in better control of when and to whom I want to disclose my identity.
All these new biometrics share one common theme:
Better privacy for a user. FaceID has the problem that I can't hide it. As soon as I walk somewhere cameras can capture and match my face against their own records, however if I never registered my face ID with Amazon then they will know that I am possibly a recurring customer, but not know who I am. Palm IDs, VeinIDs, etc. are biometrics which I can easily hold back from disclosing. Only when I actively insert or present my finger/hand/palm I allow another device to scan my hand and do a match analysis. This means that I as a user am in better control of when and to whom I want to disclose my identity.