No Jelly Bean 4.3 yet..
If a tweet from a HTC developer described by GottaBeMobile as a "notorious insider" is correct, the HTC One is "very close" to getting an update to Jelly Bean 4.2.2; although HTC has yet to confirm an update.
Android 4.2.2 for HTC One is very close.— LlabTooFeR (@LlabTooFeR) May 18, 2013
This will certainly be welcomed, as the HTC One currently ships with Android 4.1.2, which is unusual for a new phone, as that version is almost a year old. HTC's own Sense 5 that ships with 4.1.2, is currently not compatible with 4.2.2, although the HTC Butterfly already has 4.2.2 and Sense 5.1 leading many to believe that it will also be included with the 4.2.2 update on the One.
Yet another report from Toms Hardware, claims there are also rumors that 4.3 is on the horizon, but Google has yet to even confirm a release date.
No dates have been mentioned, and the Tweet is almost two weeks old; so if we assume it's a lot closer now, hopefully HTC One owners can expect this very shortly.