Leaked photo shows Touch ID on Apple iPhone 6, Apple iPad Air 2 and Apple iPad mini 3
The units that we are looking at are said to be "models," which we take as a sign that these are non operational mockups of the iPad Air 2, iPad mini 3 and the iPhone 6. Last year, Cupertino released only one model with Touch ID, and that was the Apple iPhone 5s.
Grab your salt shaker and take this with a grain of salt. While we do expect all three of these models to launch with Touch ID, we would rather hear it from Apple itself.
source: AppleClub (translated) via MacRumors, SlashGear