[ubernostrum]

Do they actually have that ability, though? There's a big difference between "the authentication mechanism has access to this API when you're authenticating" and "everything always has access to this API at all times". I haven't seen any indication that this will be generally available on-demand to applications, and Apple's track record on this stuff isn't terrible (largely because Apple isn't existentially dependent on advertising like some other vendors of mobile tech).

[batuhanicoz]

The camera and the sensors can be available but I'm certain the auth mechanism itself won't be accessible. AFAIK they have a dedicated chip for this like Touch ID and what software can is limited.