Apple has parted the curtains on its newest big cat. Lion, also to be known as OS X 10.7, will be available in the summer of 2011. While the preview was more of a glance then an in-depth look, Apple did reveal a few interesting tidbits.
The phrase "Back to the Mac," actually means that Apple will be taking some of the features found in its iOS devices, and bringing them back to the Mac.
So, what's making the migration?
Multi-touch gestures: Apple will incorporate multi-touch gestures into the Mac OS to support navigation in new features of Lion. While it doesn't appear that their use will be required, you may find that life without a Magic Mouse, Magic Trackpad, or portable Mac's glass trackpad will be less than magical. I expect a few new multi-gesture-capable pointing devices to be available by this time next year.
App Store: The Mac will get apps as well as an App Store. The App Store will be modeled after the existing App Store for iOS devices, with both free and paid apps available for one-click buying and instant download and installation. Unlike what it did with the iOS, Apple won't designate the App Store as the only way to install applications on a Mac. This leaves all existing distribution systems in place, and prevents Apple from wielding too heavy a hand in what will and won't be allowed in the Mac App Store.
Full-Screen Apps: All I can say is "Bleaah!" but that's my personal opinion, and you may not agree. I don't want to work with an application in full screen. The only exception is viewing media, such as DVDs and movies; aside from those few exceptions, I want my apps in a window, please. New versions of the Mac OS will allow applications to take over the entire screen, which may make sense in some cases, and provide a better user experience. Apple will also include multi-touch gestures for navigating between full-screen apps and the desktop.
Mission Control: This is a new user interface component designed to blend Expose, Spaces, Dashboard, and full-screen apps into one easy-to-use interface.
As you can see, the Lion introduction was mostly about user interface elements that will be adopted from iOS devices. I'm sure we will learn a lot more about what's under the Lion's skin as time goes on.