Glass- on- glass or in-cell technology?
Many people are waiting for iPhone 7 to be released. Rumor has it that this device will see the light of day somewhere around September 2016. Rumor also has it that Apple will switch to glass-on-glass touch panels, however Ming Chi Kuo, security analyst disagrees with that information and says that Apple will stick with their in-cell panels.
If they choose to go with in-cell technology then they will be able to produce even thinner devices. We still have to wait for quite some time before the release date, but one thing is for sure, Apple will continue with producing more efficient, more powerful devices that will have thinner and thinner design with each next design iteration.