Your digital game library will be accessible from any PlayStation 4
 

The digital games you buy on your PlayStation 4 will apparently travel with you, virtually, when you move from console to console. Sony R&D senior team leader Neil Brown detailed as much at Develop today. "You can visit your friend's house you can log into your account and play any game from your digital library," he said. Paired with the console's "Play As You Download" functionality, Brown promised that users will be able to instantly jump into their full library of digital games from any PS4 after signing in with their PSN ID. "This makes a digital library a practical option in the real world," he added.

PlayStation 4 games are planned for digital launch alongside physical, thus making an all-digital game library a more possible goal. Should you purchase a physical copy, you can take the Blu-ray with you from console to console; the game will automatically install on the console's HDD, though you'll still need its disc in the tray for the game to play.

http://www.engadget.com/2013/07/11/p... ign=Engadget