What does Linux do that Windows can't?

The Linux camp usually finds itself in the position of having to prove that there are open source applications and tools that do as good a job as their Windows counterparts. But what does Linux do so well that puts Windows in the position of having to play catch-up?

Linux aficionados on TechRepublic have spent some time coming up with Linux applications that can do the same thing as Windows programs, and Jack has answered the question, "What can't Linux do?" in a previous blog, but I couldn't remember when I'd seen someone list the things that Linux does well, which Windows can't equal (I can hear people saying "security!" but let's be more specific!).

Lee Matthews at downloadsquad.com has written a post called, "3 Linux Apps That Make Me Hate Windows," in which he selects applications that have no equivalent in a Windows environment.

I'm a Windows user, and it has served me well. That being said, I play with a lot of Linux distributions and there are some applications that are just so much better than anything Windows can offer that I find myself wondering how long it'll be until I make the switch.

Matthews cites Synaptic, APT, and Amarok in particular. What do you think of these choices?