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LaunchPad is an iOS-like interface of app icons. And Resume lets you turn off your computer without losing any data from the app you were working on.
Schiller talks about how Versions removes the need to save your work.
Mail now gives you two and three column views and it has features like a Web browser with a favorites menu on top.
Another feature is AirDrop that lets you see other people on your network just like you would with computers. Then you can drag files to them.