HTC One Google play editions had long received android 4.4 update. Now its turn of international variants to receive their update.
According to @LlabTooFer the international HTC One, One Max, One Mini and One Dual-sim will receive android 4.4 update this month or in February. The update will not include "HTC SENSE 6".
Meanwhile U.S variant of HTC One will receive OTA Android 4.4.2 update this month with HTC sense 5.5 skin on top.