[jiggy2011]

I guess I wouldn't consider Gnome a "heavy" desktop, at least not any heavier than Windows 7 or Mac OS desktops.

I don't think ~400MB for a window manager on a dekstop is a big deal in 2012 and being able to compose your desktop using javascript is a breath of fresh air vs using old arcane APIs. When you have as much excess horsepower as you do in a modern PC (for most tasks) it seems wasteful not to use some of it to make your life easier.