Finder 10.4
OS X v10.4 ("Tiger") introduces further changes to the Finder, including a slideshow feature (similar to that of Windows Explorer). This allows pictures to be viewed in series fullscreen directly from the Finder. Spotlight, a concept introduced in 10.4, features prominently throughout the revamped OS: The classic command-F Finder keyboard shortcut now shows a criterion-based search. These criteria searches can be saved as smart folders which display the live-updating results of the search. Two other methods of search exist: the Spotlight menu item and the Spotlight windows. These can be accessed system-wide and some have speculated that data organization and the "desktop metaphor" are going to be phased out by the high-speed search functions in OS X, thus rendering Finder redundant. However, others have commented on the delays experienced when using Spotlight, even on newer Macs.
Read more about this topic: Finder (software)