Using glass as an extension of the screen makes sense. It could be more convincing if glass elements didn’t float below the surface, but felt like they were part of it. Like the fake click effect, some UI elements could be rendered to feel like a dynamic indentation on the surface you touch. Imagine a form field that looks and feels like your phone’s screen has a real indent.

https://ia.net/topics/liquid-glass

(Wrote most of it on the way from WWDC to SF Airport, but wanted to try Liquid Glass first)