While the MacBook trackpads and Apple Watch sense two levels of pressure, the differentiation between a tap and a press, the new iPhones will actually sense three levels of pressure: a tap, a press, and a deeper press, according to sources. The 3D Touch name is therefore derived from the new Force Touch sensor’s ability to sense three dimensions of pressure, rather than two.
The new display will allow for even more functionality and shortcuts than previously expected. It could even allow for new interactions in gaming.
Apple is also expected to bring the new 3D Touch display to the rumored iPad Pro where it could be used by a stylus accessory. It's likely that a taptic engine will provide feedback to users when a press or deep press is