In a post to the Android Google+ account this evening, Google officially announced the Galaxy S4 Google Play Edition would be joining the HTC One Google Play Edition in the realm of timely updates, with KitKat upgrades rolling out "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
If you're the owner of a Google Play Edition Galaxy S4, it's time to start hitting your "check now" button. Just don't clear your Google Services Framework data.