the issue is that on typing something a popup will appear, and the user ignorant of this, presses enter. depending on what program made that popup - the effects could be VERY bad (files being deleted etc!)
So a mini program to prevent all programs from stealing focus of input. And also - appearing off to the side, like toasties in windows. possibly even in a single column so that the user can deal with them all at once when they are done doing whatever they are doing. ONLY the active program can have popup windows in cetner - but tehy are still not stealing focus.