[citation needed] Vista had a black taskbar with some transparency, 7 made it glass. If you maximised a window on Vista, the maximised window's border became

[citation needed] Vista had a black taskbar with some transparency, 7 made it glass. If you maximised a window on Vista, the maximised window's border became dark (black/with an accent colour tint) and opaque, the taskbar and sidebar went opaque as well. 7 got rid of that.