This update shall be available for the international version as well as developer version. Versi also added that HTC has made sure that the security fixes from 4.4.4 were added to 4.4.3. This strongly denotes that HTC will be skipping the 4.4.4 update for the big one – Android L.
The carrier versions of the phone for AT&T, T-Mobile and Verizon will also receive the update. If you are rocking an HTC One M8 – good news!