ICStats on 18 October 2014
Most games on PS4 have PlayGo functionality, in which games install only a part of the game that's needed to start playing and then they install the remainder of the game in the background while you play. This applies to disc games, as well as digital downloads so you don't need to download 30GB (or whatever) before you can start playing.
I thought that XB1 also had a similar system for some games, but it was always slower.
My 8th gen collection
