I just a read an article that talks about the fingerprint sensor in depth. It talks about the added security and how it can virtually change passwords forever, as well as being an amazing innovation on Apple's part. This could be the break that Apple needs considering people have been complaining about how Apple hasn't innovated anything. This could be iOS 7:
http://appleinsider.com/articles/13/01/16/home-button-fingerprint-sensor-in-iphone-5s-would-give-apple-a-new-leg-up-on-the-competition
http://appleinsider.com/articles/13/01/16/home-button-fingerprint-sensor-in-iphone-5s-would-give-apple-a-new-leg-up-on-the-competition