Here is a little of what to expect from Lion:
-Mac App Store
-Launchpad
-Full Screen Apps

@TatWza for TatsTechTalk

Introducing the best place to discover and buy new apps made just for Mac, right on a Mac. Just like shopping the App Store on iPad, the Mac App Store offers endless possibilities to browse and purchase apps. And it simplifies the way you install apps on the Mac. Just click once, and your new app is downloaded, installed, and ready to go.

The Launchpad gives you instant access to your apps — iPad style. Just click the Launchpad icon in your Dock. Your open windows fade away, replaced by an elegant, full-screen display of all the apps on your Mac. It takes just a swipe to see multiple pages of apps, and you can arrange apps any way you like by dragging an app icon to a new location or by grouping apps in folders. Downloaded an app from the App Store? Your new app automatically appears on the Launchpad, ready to blast off.

Mission Control is a powerful and handy new feature that provides you with a comprehensive view of what’s running on your Mac. It gives you a bird’s-eye view of everything — including Exposé, Spaces, Dashboard, and full-screen apps— all in one place. With a simple swipe gesture, your desktop zooms out to Mission Control. There you can see your open windows grouped by app, thumbnails of your full-screen apps, Dashboard, and even other Spaces, arranged in a unified view. And you can get to anything you see on Mission Control with just one click. Making you the master of all you survey.