Replaying to query on Facebook, HTC clarified that it does intend to update the above mentioned handsets with the new Sense 5 software features from the new HTC One, except for those tied to the hardware. We believe these may be the new camera related features such as Zoe but other than that you can look forward to the refreshed UI and the new HTC BlinkFeed.
As for the availability of the updates, HTC said it would be coming ‘in the next few months’. Note, all the devices mentioned above are the international models. No information has been provided regarding the carrier specific versions of these devices.