The latest firmware update for PlayStation 4 is now live and ready to be downloaded.
Firmware 1.52 doesn't add anything significantly profound to the console. "System software stability during use of some features has been improved," according to the update notes. As such, it shouldn't take particularly long to download, so it shouldn't interrupt your game experience.
Next time you hop on your PS4 and sign into the network, you'll be prompted to download the update. You can find the System Software Update option under the Settings menu.