I covered the list of features a few weeks ago, Flash Player 10.2 ships with Stage Video for high performance video playback and also the very cool native mouse cursors feature that game developers will love but also some performance optimizations with IE9 and also text quality improvements on mobile. With Flash Player 10.2, you can also enjoy fullscreen on one screen while you keep working in the other screen, pretty cool for the video people. Keep in mind we will keep working on little improvements like this in future releases, to always enhance the user experience with the Flash runtimes.
I wrote two articles so that you guys can get started easily with Stage Video and the Native Mouse Cursors. I hope you will enjoy playing with those features. To author for 10.2, just use the latest Flex Hero SDKs available on opensource.adobe.com (184.108.40.20623 or 220.127.116.1186).