They probably wouldn’t do this, and it would work better on the iPhone than a lot of devices. But what if they added a pinhole style, low resolution, low power camera to the back of the iPhone, like 195x90 pixels to match the aspect ratio, and it informs the blurred out background of the OS? So it’s like you’re seeing through the phone somewhat. This effect would be more striking, I think, on something thin like the iPhone Air where it would feel more like a slab of thin glass. I’m just unsure of the effect on battery life, because it would always be running, and even if the camera doesn’t use much power, the effects might tax the GPU a bit more than normal. Perhaps they could use some tricks with the accelerometer to make it update less frequently when there isn’t much movement, or at all when locked.