After the HTC One Google Play Edition, it's now Samsung Galaxy S4's turn to join the category of Kitkat devices.
In a post in Google+ , "Android" mentioned that the Android 4.4 Kikat update for Samsung Galaxy S4 is starting today.

"Starting today, Samsung GS4 and HTC One Google Play edition devices are getting an update to Android 4.4! Learn more about Android 4.4, KitKat: http://www.android.com/versions/kit-kat-4-4"

So make sure your internet is working as you will be soon reeving kikat update notification on your Google Play Edition Samsung Galaxy S4.

Source: Android(Google+)