With that in mind, Yoshida said that it might not be until 2017 before the dual-lens rear camera systems start to appear on high-end handsets. Still, KGI Securities analyst Ming-Chi Kuo, who has a tremendous track record with his calls on Apple, recently said that a second camera lens on the back of the iPhone 7 Plus would be used for optical zoom.
Apple does have a history of adding a premium feature to the rear camera on its iPhone Plus handsets. For example, the rear snapper on the Apple iPhone 6 Plus and Apple iPhone 6s Plus both feature Optical Imaging Stabilization. The latter prevents the images on a photo or video from being affected by shaky hands. OIS is not employed on the Apple iPhone 6 or Apple iPhone 6s.
Apple iPhone 6s Plus
source: XperiaBlog via AppleInside