This includes download & installation data which is, in my opinion, pretty neat. Basically it downloads specific portions of data of the game you're downloading depending on the way you play. It was announced earlier that you could play games when still downloading the game, so I'm guessing they're perfecting this. Very neat addition, and I'm hoping to see how this pans out.
PlayStation 4 can dynamically alter the order in which game data is downloaded (and how data is installed off a Blu-ray disc) based on the popularity of particular modes or tracks, it's been revealed.