"And this is what Apple can do that no one else can: make the behavior of talking to a disembodied entity on your face so socially acceptable that the voice computer revolution can finally get underway."
With 16 individual cameras, 10 of them firing simultaneously, the L16 captures the detail of your shot at multiple fixed focal lengths. Then the images are computationally fused to create an incredible high-quality final image with up to 52 megapixel resolution.
Instead of using chemical coatings they used lasers to etch a nanostructure on the metal itself. It will not wear off, like current less effective methods.