Here's something that you might have missed in HTC's new press release about the HTC One X+ today. Apparently, the press release also revealed that the previous gen HTC One x and the HTC One S are scheduled to get Jelly Bean sometime this month. Here's the quote,

The Android Jelly Bean with HTC™ Sense 4+ update is scheduled to begin rolling out for the HTC One™ S and HTC One™ X from October.
Source: HTCOneForum