I'm patiently waiting for the desktop metaphor to die. I'm a very happy user of i3 (tiling) window manager and it's beautiful how efficiently it uses space. Meanwhile in the "desktop metaphor" world, interface designers have settled on fullscreen applications (skype, even music players) and tabs. Because no one wants to bother moving application windows around with mouse.

i3 is explicitly for power users, but someone will eventually take the idea of tiling window managers and make something with a low learning curve. And that will be the end of desktop icons and movable windows.