OS X is based in BSD UNIX, meaning you would have to take a sledgehammer to the computer to make it crash. The OS X skin for windoze is not OS X. I have a windoze XP theme for OS X does that make it XP?
You can do anything you want on any computer, that is not the issue. The issue is which computer can do it better. OS X wins hands down.
Graphics Apps on OS X are incredible, Memory management rocks, the interface is fantastic and you glide thrugh it seemlessly unlike the ploding pace of using any windoze OS. Hardware software integration are top notch, you don't ever have the problem of the OS not having a clue what bit of hardware you are using.
I can boot up the terminal and access darwin, can you access DOS in Xpee?
I can set up printers, networks, remote access, etc. Compleatly seemlessy with PC's and Mac's in mearly seconds. Case in point, a LAN party over here tried to set up an NT box as their main game server, they ended up opting for a G4 running OSX cuz it didn't give them as much truble and setup was so much more straight forward.
Applications written for the system are incrediby stable and fast and piss all over their PC counterparts, and best of all it's not affiliated with Nazisoft.