There is probably a lot more to the story than what is in this video, it is a marketing tool after all. With the exception of the amazing AE integration, there is nothing that couldn't have also been done using FCP X's extremely powerful Red workflow. The ability to make selects with 6K Dragon footage while proxies are being generated is something PP can't do. They even used Intelligent Assistence's Change List X (X as in FCPX) by XML round tripping to FCP7 to track edit changes. There were a lot of very smart people pushing this wagon up the hill.