- better AppArmor
- "PowerNap" (reduces power consumption by 14% by selectively disabling cores on certain Intel hardware.
- "private clouds" (don't know what that means)
- Latest Linux kernel (2.6.38 vs 2.6.35)
I'd like to know this too. Ubuntu Server is headless. I tend to stick with the LTS versions even for my desktop unless something really amazing is introduced in a subsequent non-LTS version.