PlayStation 4 will allow you to pause games while the system is sleeping, so you won't ever lose your progress when terrible distractions like "sleep" and "real life" get you down.
Essentially, you'll be able to put PS4 in a low power state that preserves your game session by simply hitting the console's power button. Later, when you return to your gaming sanctuary, you can hit the power button again to return to your session.
Sony had the following to say in a press release:
"PS4 radically reduces the lag time between players and their content. PS4 features “suspend mode” which keeps the system in a low power state while preserving the game session. The time it takes today to boot a console and load a saved game will be a thing of the past. With PS4, gamers just hit the power button again and are promptly back playing the game at the exact point where they left off. Additionally, users can boot a variety of applications including a web browser when playing a game on PS4."
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