Maybe here is a misunderstood.
Years later, some home button concepts appear, the most commented was one with "gestures", basically a home button with a capacitive trackpad
(as on blackberrys), very useful for gestures to go-back, next, cursor control, etc. Adding to such trackpad a fingerprint sensor not a big deal and has sense because enable to feel if the finger is alive and read it print. BOTH CONCEPT DON'T IMPLIES TO ABANDON THE CLICK ACTION (as many know Blackberries uses a capacitive trackpad with click action).
So Welcome the New Home Button (While it Keeps Clickable)....