Update: We've heard reports that the update is also starting to push to the HTC One M7 as well. Double your pleasure, double your fun!
HTC is now pushing out the Android 4.4.4 update to the Google Play edition HTC One M8. The update is listed as improving performance, security and stability, as well as fixing a few bugs. As with the Nexus devices that received the update, don't expect to see much difference in user-facing areas — this is a behind-the-scenes fix.
If you have an HTC One M8 Google Play edition, it's time to start checking for that update.