BumpTop is a
crazy but simple idea.
Why losing "realistic" things of our desktops like
making piles of books, magazines, pushing things, and such? Just develop a
physics system, a small 3D engine and some cool mouse-drawing commands (like in
Black & White videogame, you "draw" things that act like commands). Is not
easy to explain but you can watch the video. I don't know if this is more
"natural" or not than normal computer desktops (whenever Linux, Windows or Mac
ones), but at least is some fresh air...