Apple is rumored to be considering a switch to the Apple Watch's touchscreen technology for future iPhones as the firm is reportedly unhappy that in-cell panels that current iPhones use are struggling with touch sensitivity on screen edges.
While all iPhone models ranging from the original iPhone to the iPhone 4s were outfitted with the traditional glass (G/G) panels, Apple's engineers in 2012 switched to in-cell technology for the iPhone 5. Since the iPhone 5, all iPhone models have used in-cell tech.
In-cell technology eliminates a layer by building the capacitors inside the LCD assembly itself, which allows for a notably thinner appearance of the screen.
According to an analysis by DigiTimes Research based on supply chain data and market observers, a 2017 iPhone model (presumably to be called 'iPhone 7') is expected to make a switch to G/G, but the upcoming 'iPhone 6s' and 'iPhone 6s Plus' models are expected to still use the in-cell screen assembly process.
Reverting back to using G/G panels would let Apple add more features to iPhones, including ultra-sharp screens and nearly bezel-less appearance.