But what makes them different will also help bring them closer to the way modern PC users use their desktops. It???s all about efficiency and simplicity.

Nonsense. What makes them different is developers apparently wanting everything to be a bloody Ipad. It's a joke. Gnome 3 and Unity might be the "next big thing", but frankly, interfaces optimized for a touchscreen only really work for *touchscreens*. I'm sorry, I want a functional desktop environment for my desktop pc. If I'd wanted a bloody Ipad, I'd have bought one.