If Apple really wanted to blow our minds with cameras, they'd remove the zoom altogether, and switch the cameras to prime lenses. Prime lenses have no zoom functionality, and thus due to physics, removes all the compromises in quality that zoom introduces. One of the biggest advantages, amongst many, is a much lower f-stop, which greatly increases performance in low light conditions, and also allows greater background blur. On top of that is a much better image quality in general. Zoom with a prime lens can be achieved via your feet, via cropping, or via changing lenses (of which the iPhone has 2, and the iPhone Pro has 3)