Features from Apple's Details Page Left Unmentioned

"Capture a region of the screen QuickTime Player lets you record part of the screen, such as a specific window. It’s perfect for creating a video tutorial of an application."

Don't think I've seen that mentioned elsewhere--relevant to the discussion on new OS features potentially replacing 3rd-party applications.

"OS X Lion includes a built-in restore partition, allowing you to repair or reinstall OS X without the need for discs."

Relevant to the install discussion.