I would find it very useful to have a taskbar button / keyboard shortcut that would allow me to shift / cascade all active windows in one direction (left/right/up/down). As an example - in a 3 monitor horizontal setup (A,B,C) - you could press a key-combo and have all of the contents on A -B, B-C and C-A. The coding is mostly there since you can already do this for the active window -- it would just be a matter of doing it for all windows in the active screen (of course I probably over simplify).