Mac OS X Lion top 10 features

1. Multi-touch gestures — Apps will be controlled by different multi-touch gestures; including three fingered swipe, scroll, pinching and zooming.
2. Full Screen Apps — Much like iOS5, apps will be full screen in OS Lion.
3. Mission Control — Like an expanded expose. All of your open app instances are grouped by app
4. Mac App Store — Mac store is now built in, as well as in-app purchases. The new built in version will also include push notifications for app updates.
5. Launchpad — Make a simple gesture: pinch motion — all your apps fly on screen.
6. Resume — Before you had to quit apps. Now when you launch an app in Lion – it brings you right back to where you were when you quit.
7. Autosave — Lion automatically saves your work in the background without you having to do much.
8. Versions — Automatically save different versions of your document as you’re working.
9. AirDrop — A Dropbox-type feature that allows you to get documents between computers.
10. Mac Mail Version 5 — Including a threading feature called conversations.