MacWorld: At the "Back to the Mac" event, Apple CEO Steve Jobs showed off the latest version of OS X and an updated version of the MacBook Air. Codenamed "Lion," the OS X update makes the Mac a lot more like the iPhone and iPad, with full-screen applications and a Mac App Store. The Mac App Store will become available in 90 days, but the rest of the OS won't roll out to users until next summer.
The new MacBook Air also looks more like the iPhone. It's smaller and uses a flash storage drive instead of a traditional hard drive. Early reviews have not been particularly complimentary.