Face ID and Touch ID for the Web
So roughly speaking this is WebAuthn for a web site, with the iphone acting as the dongle.<p>It's a really good idea.  I can see there being a big demand for just simplifying signin - I can easily see a time where it is worth not having the hassle of managing multiple signin processes and just choosing webauth or nothing.<p>Edit: to be clear this won't affect B2C sites whose monetisation is based on getting as many people as possible.  But imagine a saas business charging upwards of 100 bucks a month - they have something valuable to protect, and the security story just got a lot easier