I concur with yours. I'd add:
1. Copy, cut + paste, and delete operations just _work_ rather than using 100% of the CPU and memory and choking up the system.
2. On my older hardware I can burn a CD, rip another CD, listen to mp3s, and browse the net in realtime. Try that on *any* windows workstation, no matter how beefy the hardware.
3. Almost virus immune.
4. The same OS can effortlessly be configured to be a hardcore firewall / IP-masquerade server / FTP server / SSH server / etc. as can be run as a normal workstation.