The Meizu M1 Note 2 has carried rumors for the longest time that it will come with a fingerprint sensor in order to keep up with the times, where the shape of its physical Home button does offer something in a similar direction. However, based on the software that is found on this leaked prototype, this does not seem to add up as there is no indication of any fingerprint scanner.
Ah well, it would then be easier to explain that the new Home button happens to be a design change, without any kind of new functionality built or included. It ought to run on Meizu’s Flyme OS that is based on Android 5.1 Lollipop when it arrives.