7. The new iPhone 6S and iPhone 6S Plus pack a new 3D Touch screen, which is now three-dimensional, as the phone responds differently to light, medium and hard touches. A light touch does what the phone does today. You can open an app or move a cursor when typing. Press a bit harder on an app icon to access a contextual menu, similar to right-clicking the mouse on Windows computers. Do this with the camera app to quickly take a selfie or record video. Normally, you have to open the camera first, then choose what you want to do. Inside apps, this medium touch opens a preview, such as a map when you click on an address in a message. Lift your finger, and you’re back to the message. But press even harder to launch the Maps app. In some apps, options slide up from the bottom with a medium touch. This feature, called 3D Touch, takes getting used to. Out of habit, I still open apps the regular way, even though 3D Touch is quicker. But it could one day be as useful as the fingerprint reader on phones.