Also, every app, whether it is hidden or not still responds to Alt+Space which does what the single-click used to do and bring up that old window controls menu, and it still drops down from that same Win 3.x corner. It's a fascinating commitment to a strange backwards compatibility.

(Up until Aero Snap in Vista and it's keyboard shortcuts of Win+Arrow Key I used to use Alt+Space,M a bunch because it was always the easiest way to move any window by keyboard in the event it got stuck somewhere out of mouse range or you just didn't feel like switching to mouse.)