Apple developing 3D Touch technology for larger displays
According to AppleInsider, Apple is currently experiencing difficulty in applying 3D Touch technology onto larger tablet-sized displays. While the feature works without any major issues on the iPhone 6s and 6s Plus, scaling it to larger sizes may not be as easy as it sounds.
The claim matches up nicely with another recent report suggesting that the current 12.9-inch iPad Pro and rumored iPad Air 3 did not and may not ship with 3D Touch, respectively. The current 3D Touch on the iPhone 6s series is reportedly a refined version of the Force Touch from the Mac Group that is currently being used on the Apple Watch and MacBook trackpad.
At the heart of 3D Touch is a "flexible" front glass and an underlying sensor matrix that can respond to both finger pressure and positioning when the user taps on the screen. A perfect target road map would be to scale up from the Apple Watch and MacBook to the iPhone 6s and 6s Plus to the iPad Air 3 and iPad Pro.
Apple is expected to introduce the iPad Air 3 during the first half of 2016 with no 3D Touch capabilities due to said production issues on scaling the technology. Thus, users may have to wait until the launch of the inevitable iPhone 7 before 3D Touch can make its comeback to new Apple devices.