HTC One KitKat update for AT&T and T-Mobile approved, UPDATE: T-Mobile OTA beginning
The new user experience includes a new BlinkFeed, and the photo gallery application has been updated as well. HTC added a do-not-disturb mode, simplified the lock screen widget set-up and is said to have improved low-light camera performance.
All we have to do now is wait.
UPDATE: Well that did not take long. A tipster in New York just sent us screen shots of the update to Android 4.4.2 on his HTC One with T-Mobile. The file is a little over 560MB, so it is a good idea you have a solid network connection available prior to download.
sources: HTC (Twitter) via Droid Life
Things that are NOT allowed: