I hate this. My desk is messy enough already; the computer is where I come to escape. It’s terribly clever, though, I’ll give them that.
More general point: have you ever wondered at the mixed metaphor of putting a “window” on a “desktop”? I can’t help thinking that the GUI took a wrong turning when those two concepts were permitted to be mixed on one screen. What organisational metaphor would you use for a computer, given the chance? What would make most sense for an educational computer, if you weren’t worried about compatibility with ‘adult’ machines?