Apple says that Lion will be available in the summer of 2011. Pricing has not been released.

With the demonstration of Lion and how it uses finger gestures, a particular accessory could possibly become mandatory for Mac users: the . Released in July, the Magic Trackpad is basically the glass trackpad found in Apple’s laptops made into a self-standing input device. Such a device can help bridge the gap in the whole Apple user expereince between Mac OS X and iOS.

Of all the Mac-related announcements made in 2010, the new . The Mac App Store will work similarly to the iOS App Store, providing an easy-to-access marketplace.

While software developers will be able to use the Mac App Store as a way to get their software in front of a large population of Mac users, developers will have to write software according to the . (On a related note, Apple decided that its  and that developers should submit software to the Mac App Store.) There’s also a concern that the Mac App Store would lead to the , like iOS.