September 12 Event Preview

The new iPhone is expected to offer a large screen that takes up almost the entire front of the phone, without the large blank spots (bezels) surrounding the screen.
The home button is where Apple typically stores Touch ID, its fingerprint scanning solution, so either Apple is moving Touch ID to the back, or relying entirely on new facial recognition technology to identify you.
Currently, you only need to tap the home button to return to the main screen with all of your apps on it.
Instead, users will rely on certain gestures, or swipes across the screen, to return home or switch between applications, according to Bloomberg.
All of this will require you to relearn how to use your iPhone.

Read more on: http://www.cnbc.com