PlayGo

PlayGo, by using a secondary custom ship, allows quicker start to supported games, with only need to a transferred chunk of the game data.

If users prefer to play their game directly from disc, PS4 will install data to the hard drive during play.

Similarly, system updates are downloaded seamlessly in the background without interruption.

PS4 also features technology that attempts to determine trends, including titles a gamer is likely to express interest in next, and then automatically download a small percentage of those games in the background, even in sleep mode.

Killzone: Shadow Fall supports the PS4's PlayGo functionality, allowing players get get gaming before the whole game (39.7GB ) is downloaded, but it's been confirmed that this initial download is still a sizeable 7.5GB.