Steve Jobs previewed Tiger (Mac OS X 10.4) on Monday. Of particular interest were Spotlight and Dashboard.
Spotlight applies the metadata-based content management system I recently exalted in iTunes & iPhoto to the entire Apple operating system. “Spotlight technologies make searching smarter, more flexible and powerful by indexing the “what, when and who” of every piece of information saved on your Mac.” The interface for detailed searches is consistent across all Apple applications and very straightforward.
Apple also continues to innovate in window management solutions. Following on the heels of Expose and Dashboard, Apple has filed a patent for a user interface technique entitled "Graduated visual and manipulative translucency for windows" that would give active windows more visual importance on the user's screen, while unused windows would slowly fade into the background.