1) You need to do something when many windows are open. Making windows small is predictable and lets the user position the windows "correctly". Possible "corre

1) You need to do something when many windows are open. Making windows small is predictable and lets the user position the windows "correctly". Possible "correct" positions I can think of is: move a window to a different workspace (so not all are visible at the same time). Make a window floating (I often have a small terminal open that I shove into deadspace of another window). 2) It can serve as a selection pane. Half of the screen is devoted to the current window, While the other half (possibly sized to take up less than half the screen) is storing a bunch of windows to be swapped in for the current one.