At the moment, if you hide an area, it will only hide it in the 3D view. It would be nice if you could hide it in all views as things overlap and it becomes more difficult to see.
This also would need maybe a list somewhere of hidden objects so you could unhide them as needed, or maybe a key shortcut to like "unhide all" in the short term.
This might be something that might work in conjunction with a "group" system so you could group objects together, but that's not the focus of this feature request.