Something some people disliked about Siri is it could be a security risk on the lock screen. You could also disable it on the lock screen but that destroys half of its usefulness. Now the fingerprint scanner is on the home button so maybe apple has it so when you click to hold to activate siri it will also scan your finger to make sure it is you before activating it? I think it seems like a good use of the fingerprint scanner. Does anybody know if apple actually does this?