Images via NWE
The component in question includes four small cutouts surrounding the single-lens camera, housing the springs and equipment that allow for the lens to float slightly, leading to clearer, less blurry images. The same component for the iPhone 6 and iPhone 6s lack these cutouts. Since the iPhone 6 and iPhone 6 Plus in 2014, Optical Image Stabilization has been limited to the "Plus" versions of Apple's smartphone, alongside features like better battery life.
Currently, it's believed that Apple will reveal the iPhone 7 at an event on September 7, and open up pre-orders on September 9. The specific launch date is a bit more ambiguous, with both September 16 and September 23 flagged as potential options.