Guys... go over here 8 worst Windows 8 annoyances and how to fix them - Gadgetbox on NBCNews.com
Scroll down to "2. Switcher Groups All Desktop Apps Into Just One Thumbnail". Read where it says at the end of this, "Also, if you dock the desktop next to your primary app in the Metro UI, you'll see a list of tiles representing all of your open desktop apps."
The picture does show multiple open desktop windows. I just can't figure out how they did this? What do they mean by docking the desktop? Could this have been in a Preview and not RTM????