I still think that the UI of Windows 2000 was better. Windows 2000 had also better usability for keyboard users since you can be extremely productive without a mouse. I think it is the last versions where they really cared about keyboard users. For example latter versions added extra information to Explorer and that had the resukt of requiring extra keystrokes to move from the path bar to the file list.

Anyway I am digressing... I came here to say that while the Css is very cool, it seems to introduce strange delays. On my android phone actions on tabs, checkboxes and radio buttons give a result at least one second after i click them.