If you haven’t received your update notification yet, you can try updating manually under Settings > About Device. The update is about 1.3GB in size so it’s best to download this via fixed WiFi.
With the latest Android, you get Now on Tap, app permission controls and a more power efficient Doze mode that prolongs your battery life on standby. Some notable changes include lighter colours for the Touchwiz interface and they have added manual shutter speed controls for the camera’s Pro mode.
Thanks @eivanne and Tommy for the tip!