Forthcoming Mac OS X screen snapshots

One of the most essential features for most users in the forthcoming Mac OS X version 10.5 is the Quick Look:

Quick Look allows media to be viewed in the Finder without launching Preview. It can be used to look at a single item or multiple items. With multiple items, a slide show or index sheet can be viewed.

Good snapshot gallery of the Mac OS X 10.5 "Leopard"