All the browsers are coming with Tabs and preview the site history feature, which was introduced by Google Chrome. Now Apple Safari 4 has come up with lot of cool new features including Tabs, history preview.
Apple Safari 4 new Features
Top Sites : See your favorite websites at a glance. Open one with a single click.
Cover Flow : Flip through your site history or bookmarks like you flip through albums in iTunes.
Full History Search : Easily retrieve sites you’ve seen before. Spot the one you want in Cover Flow.
Tabs on Top : Manage your tabs elegantly and open a wide window for exploring the web.
Nitro Engine : Wait less. Browse more. Surf the web with the world’s fastest browser.
Windows Native Look and Feel : Vista and XP users: feel right at home in Safari for Windows.
Developer Tools : Access the best suite of development tools ever included in a browser.
Interested in trying Features : ? Download here(apple site)