Best Of Tiger

Spotlight
When I first heard about Spotlight, I was only slightly impressed; I figured Dashboard would be the coolest new feature of Tiger. Well, I was completely wrong. I failed to realize the implications of Spotlight's complete integration into the operating system. In fact, I still don't think I understand all of the implications of Spotlight's technology. I do believe it will change the way I use my computer. No more rooting through disks and folders in a filesystem, but instead, everything will start with Spotlight.

Automator
This is not simply visual AppleScript, but a sibling to AppleScript; the two are complementary (and know, I don't mean their angles add up to 90°). Automator is also integrated through out the operating system, in Apple's programs, and possibly in third-party programs. Depending on how you use your computer, this could definitely increase your productivity

Dashboard
Exposé for widgets that are easy for people to develop. Looks cool, but I'm no longer that impressed with it. (Blame Spotlight)

Quicktime 7
A major overhaul and a lot of features that were a long time coming. First, the live resizing is cool and the aesthetic enhancements don't end there. Second, you can finally record audio and video using Quicktime Pro. Finally, it has support for the new H.264.

Preview
Apple isn't touting the updates in preview, but I think they deserve a mention. New support for reading PDF Annotations, PDF Form support, Image Correction, Slide Show, RAW image support, and more.

Tiger, Worth The Upgrade?

In a word: Definitely
While Panther took some convincing, Tiger's new features make upgrading a necessity. With over 200 new features, Tiger is the biggest overhaul of Mac OS X ever. While most of them are under-the-hood features, Tiger has more major new features then any other upgrade. Just Spotlight and its integration into the Operating System is worth the $129. Check out all of Tiger's goodness at Apple's website.