globalisateur on 18 October 2014
LIke others said, PS4 has a dedicated ARM processor along with 256MB to take care of backgound install, downloads (that's why PS4 can download several files (8?) simultaneously) and to manage HDD access, everything while playing.
Also they have a great software called PlayGo that handles the whole thing with probably a specific API like: stuff to be installed in priority, in SP games, it's easy you install the levels in order.
