You can take this rumor with a bit of skepticism since it comes from DigiTimes and KGI Securities analyst Ming-Chi Kuo -- both of whom have rather crappy records when it comes to rumors -- but supposedly the dual-lens camera systems that are expected for the next-generation "iPhone 7 Plus" are being tested by Apple right now. The company is allegedly testing camera modules from its main camera supplier Largan Technology and two "unnamed" Japan and China-based vendors.
If it adopts dual-lens camera technology as a differentiating factor for the iPhone 7 Plus, Apple will most likely use technology that was obtained through the acquisition of LinX Computational Imaging Ltd. last year. That company's tech provides a way for a smartphone to use optical zoom rather than the grain-inducing digital zoom, and can also be used for precisely determining the distance to every point on the object being photographed. That last capability can produce what are essentially 3D scans of objects.
DigiTimes notes that other smartphone vendors are already jumping on the dual-lens camera bandwagon, although none of them are using the LinX Imaging technology.