Smart of Apple to open up the apple id to 3rd parties, resilience of the security of the apple database with finger id's will be key to hold up! looking forward to the day you can log on with an apple ID on a android phone...
In June, during its WWDC event, Apple announced that it was opening up the Touch ID fingerprint sensor to third-party app developers. Earlier, Touch ID was limited to App Store and iTunes purchases and unlocking the device. Here are some banks who have already adopted Touch ID in their mobile banking apps: American Express - The bank recently updated its Amex Mobile app with a new Touch ID based feature. Now you can log into your account, using the banking app, using Touch ID. The new feature utilizes the fingerprint sensor on your iPhone for logins. ING Bank - The Belgian version of ING Smart Banking app was updated last month to support Touch ID. The app now provides secure access to banking services on the app through fingerprint authentication.
http://letstalkpayments.com/7-banks-integrated-touch-id-2-follow/