After Nexus 4.4.2 official update now it is the time for HTC One. The Google Play Edition of HTC One got the latest KitKat taste. The HTC One users are receiving OTA (over the air) update, but if you have any problem with OTA you can manually update the KitKat 4.2.2.
Download HTC One Google Play Edition KitKat 4.2.2 Update
via HTC Dev Center.