Unfortunately... I'm not as impressed with Leopard as I thought I would be.
Disappointments:
I have no external drive, so no Time Machine for me.
There is no iLife '08 included.
Other than Time Machine, there are no new apps. Excluding Spaces, Quick
Look, etc, but those aren't real apps.
Turns out a large percentage of the 300 new features were things like the Arabian Spell Check.
What I'm Happy With:
Design. I must admit, this is the real reason I bought Leopard. New desktops, the doc, new icons, menubar, etc.
Finder Coverflow and Quick Look. Great to find & browse files with.
Screen Sharing. I don't use it for necessary purposes, but it's fun to use.