The PlayStation 4 isn’t even a week old, yet it’s already on its second system update.
The update, System Update 1.51, is out now for PS4 owners to download and install to their systems. It improves the stability of PS4 software and makes minor changes to the UI, “such as clearly indicating when a user downloads a game and a game patch at the same time.”
If you’re a NA PS4 owner, your system should download the update automatically.
{Source: PlayStation Blog}