The Windows interface used to be clean and usable. Then they saw Mac OS X's Aqua and panicked, scrambled and came up with the turd that's XP, losing the "clean"; kept polishing that turd and came up with Aero in Vista, losing the "usable". It's a cautionary tale. With Metro Microsoft is at least getting the "clean" back, maybe the next iteration will bring back "usable". One can always hope.