Just finished reading the Live coverage of Steve Jobs' keynote at the Apple 2006 Worldwide Developers Conference (WWDC'06) in San Francisco.
There are so many new features in the new Mac OS X (code name "Leopard"), it will be even more exciting to be using a Mac starting in 2007.
Two of the features I definitely will use are "Time Machine" and "Spaces". For the former, I had been trying to find a backup software that does incremental backups on my Macintel. I had been using Carbon Copy Cloner, but its incremental backup (synchronization) feature is broken on Macintels. Now with "Time Machine" built into the up coming Mac OS X, there will not be any more excuse for people to not have a back up of their Macs.
As for the latter, "Spaces", I also currently use an application, VirtueDesktops, that does similar thing. But Apple's Spaces is much more featured and some of which I will definitely be able to take advantage of, that is not currently available in VirtueDesktops.
So check out the various sites with coverage of the keynote and start salivating for the next Mac OS X this coming Spring.