EDIT 2: Chessbase is primarily a database system that specializes in organizing and handling chess-related data (games, positions, middlegame themes and opening fragments).
Chessbase itself is NOT an engine, so it has to use chess engines to provide the brains for the analysis/kibitzer feature. CB11 apparently will ship with Fritz 6-Engine und Crafty-Engine according to the link included to the original post.
Aside from additional data for the Megabase 2011 database, I would hate to think that the only selling point will be the access to 5 million games online.
See the Enlgish-translated version of the same link here.
Chessbase 11 will be available at Oct. 15th (english version) and Oct. 1st (german version).