While Hardy only got a touch-up paint job, each of its three software engines—the Linux kernel, the GNOME desktop environment, and the Xorg graphics handler—got an actual upgrade. The kernel chages include better power management for 64-bit processors and (supposedly) better performance in multitasking. Xorg, the not-fun-to-configure graphics manager, gets more monitor and video card compatibility, along with a GUI tool to change the resolution and rotation of an external monitor or projector on the fly.
Lifehacker did a nice job with the screenshots. Nothing revolutionary in this version, but especially with the way the installer looks, I love that Linux is getting more and more accessible to the average user. I dig the abstract heron design, too.