iPhone 6s Display
The iPhone 6s display and the iPhone 6s Plus display should offer users the same size as the current models. There is little chance of a new resolution for the iPhone 6s or iPhone 6s Plus, but that doesn't mean Apple plans to avoid any upgrades to the screen.
Multiple reports indicate Apple will add Force Touch to the iPhone 6s display and iPhone 6s Plus display. In addition to the 4.7-inch and 5.5-inch displays we see on the iPhones today, the new screen should be able to sense a press with more force.
Force Touch is not focused on identifying a long press, it's about identifying a press with more force or pressure. This will allow the iPhone 6s to show a secondary set of controls. On the Apple Watch, Force Touch can bring up more options in the music app or clear all notifications.