I don't think the appeal is in the minimalism or the lack of visual garnishes. It's that these panes and quickly changing elements are fast and they appear thin, lightweight and therefor emphasize the speed. You can see the light glowing through the panel. It's energizing.
Metal or drop shadow or physical looking sliders imply solidity and weight. That was a desired thing in the era when we were getting used to screen interfaces. But metal implies that it doesn't move fast. You can't replace an interface with a new modal one that quickly or it looks unreal and weird, like you are flinging metal cabinetry around !
Metal or drop shadow or physical looking sliders imply solidity and weight. That was a desired thing in the era when we were getting used to screen interfaces. But metal implies that it doesn't move fast. You can't replace an interface with a new modal one that quickly or it looks unreal and weird, like you are flinging metal cabinetry around !