I used to give Luc the benefit of the doubt. Now I see he's just a troll/whiner. Is the average user really going to be messing with xorg.conf? No. They will use the graphical configuration utilities. Will the average user want the feature Luc wanted to use? No. If an ordinary user accidentally enabled that feature, they would think "Oh no, I broke something".
Oh, and "virtual desktop" being available on Windows out of the box? Not in XP, that's for damn sure.