If you have an iPhone that has a display that can be seen in direct sunlight, it must be from the future or something. I've never seen any such thing. At best they're only many times less bright and clear and high res than a mirror is.

I really love technology when it solves a problem, but I don't see what the advantage here is. Even if you somehow manage to find a magically clear display and a camera that's great in low light, you've only gotten it to be as good as a $10 mirror.