Well, that's not exactly the mechanics of it (though the end-result is pretty-much the same). The switchover in June of last year was for over-the-air television. There was no requirement for cable channels and/or cable systems to switchover. And there are some low-power over-the-air stations that did not switchover last June. There are lots of equivocations to be made in this regard.
However, like I said, the end-result is pretty-much the same. No cable system of any appreciable size operates as an analog-only system. Indeed, offering analog service is considered a bonus, and consumers and municipal leaders express concern about all the systems, like U-Verse, that went to digital-only service, thereby rendering all the analog televisions out there useless without a converter box. And U-Verse's digital transmission is not superior to that of many other cable companies, especially for the channels that viewers watch most.
There are some good things to say about U-Verse: This isn't one of them.