It’s like when safe area insets appeared in iOS 11: it wasn’t clear why you needed them until the iPhone X came along with a notch and a home indicator. And then it changed everything.

There has also been an emphasis on “concentricity”. It’s an impossible thing to achieve and an easy target for ridicule. But it’s another case where Apple wants to take control of the UI elements that intersect with the physical hardware. All of this makes me think that Apple is close to introducing devices where the screen disappears seamlessly into the physical edge. Something where flexible OLED blurs the distinction between pixels and bezel. A new “wraparound” screen with safe area insets on the vertical edges of the device, just like we saw with the horizontal edges on iPhone X.

Other challenges, like infusing your own branding into an app with clear buttons will be easier to reason about once the reality of the hardware drops. Until then, stay away from the edges and wait for Apple to reveal the real reason for Liquid Glass.