Apart from today's announcement regarding the refreshed MacBook Pro laptop range, Apple also announced the availability of the developer preview of the latest iteration of the Mac OS X, codenamed Lion, which will be available through Mac App Store.
Yep, you will be able to download an operating system through the desktop equivalent of the App Store. Apple Insider (opens in new tab) does an excellent job of rounding up previously undisclosed features including a new version of Mail which resembles the iPad, AirDrop which allows users to transfer files from one Mac to another wirelessly with no setup at all, Resume which remembers the App state even if you restart your Mac and Autosave which save documents as you work.
There's another interesting addition, the FileVault which provides with Full Disk Encryption both for local and external drives with the ability to delete data from your Mac within seconds.
“The iPad has inspired a new generation of innovative features in Lion,” Philip Schiller, Apple’s senior vice president of Worldwide Product Marketing noted in th press release before adding that “Developers are going to love Mission Control and Launchpad, and can now start adding great new Lion features like full screen, gestures, Versions and Auto Save to their own apps.”
Apple also added that there will be a Mac OS X Lion Server version which will add support for the desktop version of the OS, iPhone, iPad and iPod Touch devices but not the Apple TV, at least not for now.