Well, this is certainly interesting. A list of HTC devices expected to receive Android 4.3 updates has surfaced before Google has even confirmed that such a version of Android exists.
You can see from the accompanied photo that a number of models should see the next release of Android come the 4th quarter of the year, including a handful of older (2012) handsets.
In line to see Android 4.3 are the HTC One, One X, One X+, Droid DNA, and Desire HD. Unfortunately, there are a couple that will get left behind, including the Desire V, Desire X, Droid Incredible 4G, and One S.
Keep in mind that this list is unofficial and Google has yet to formally unveil an Android 4.3 build. With that said, this list seems fairly accurate at first blush; newer, more popular models getting the latest release while others stay back.
Via Phone Arena