In a new piece from Wired, PS5 architect Mark Cerny revealed some information about the installation process of the Playstation 5. The system will still require you to install the games, but you could install only parts of the game such as only the multiplayer part of a title like Call of Duty.
“Even though it will be fairly fast to boot games, we don’t want the player to have to boot the game, see what’s up, boot the game, see what’s up. Multiplayer game servers will provide the console with the set of joinable activities in real time. Single-player games will provide information like what missions you could do and what rewards you might receive for completing them—and all of those choices will be visible in the UI. As a player you just jump right into whatever you like.”