Imagine a large open plan space full of cubicles.

Now imagine that same space, redesigned with walls and doored-offices. It would be a rabbit warren, and not only would most people not have a window, you couldn't even see a window while walking around.

Which got me thinking. A compromise between open plan cubes and rabbit warren offices would be to slightly enlarge the cubes, and extend their walls up to the ceiling, but the wall material above chest height would be glass, so natural light has a chance to distribute throughout the space.