TigerPRO said:
This release is huge compared to all the last 4 major releases..
I wouldn't agree with this statement. I felt Panther's features were much more interesting/useful from a user's perspective (Expose, fast user switching, redesigned open/save dialogs, better performance etc.), while Jaguar was more interesting from a developer's perspective (Quartz Extreme - which so many of the new technologies are built upon, Rendevous etc.).
Spotlight is a very useful tool, but I don't believe it's quite as earth shattering as it's made out to be. Will most people pay $130 to search faster? Some certainly will, others will require more.
The most interesting thing about Dashboard is that it could lower the bar for developers entering into Mac development. It seems squarely aimed at people with design talent but relatively little technical/developer know-how to develop for the platform. But in the end, it's another widget (in the loosest meaning of the word) architecture like desk accessories, docklets, menulets or Sherlock plug-ins, just prettier. We'll have to wait and see if it turns out to be genuinely useful or just eye-candy.
After that, there are a lot of things to appeal to developers, but only time will tell if we'll see the benefit of these in Tiger or in the next big OS release.