From what I read, then all the fluff about Oberon is mostly about the tiling window manager.
In case anyone wants to try something like this on modern operating systems then it is actually possible: Xmonad, awm, ratpoison, ion, larswm... (and list goes on)
I like the idea of a TWM zooming out, showing you all your windows scaled down, and then allowing you to come up with window groupings in a visual way.
Or, maybe you could zoom all the way out, then start tossing out windows you don't care about and the windows rearrange themselves and zoom in as you do so.
In case anyone wants to try something like this on modern operating systems then it is actually possible: Xmonad, awm, ratpoison, ion, larswm... (and list goes on)