Just like other companies, just because you aren't making boxes, doesn't mean you can't continue to sell service, most of the time its a refurbed box anymore anyways ...
I have 2 refurbed D* boxes I'm using right now that have worked great for years now.
Keep in mind that, just because they service you with internet, doesn't mean that they have U TV there.
If you've already had U TV in that location, then they really should give it to you again, if you ask for it.
There are plenty of people around who still have Uverse in my neighborhood, despite AT&T jacking up the pricing, although that is shrinking pretty fast as a lot of people move to Hulu+Live, YTTV, and the like. It was available when we moved in 3 years ago -- we just chose not to go with it because their 6-tuner box had been hamstrung by a firmware update to only allow 4 active tuners. We couldn't get DirecTV, which we had at our previous house, due to LOS issues, so we got Dish, which was great until we realized what we watched on it only amounted to about 10% of our total viewing hours. That wasn't a Dish issue per se. It would be true of any traditional linear delivery service, including YTTV like we have now. At least with YTTV we don't have to switch TV inputs.
I realize that boxes get refurbed, and we probably would have ended up with refurbed boxes had we signed up 3 years ago. I also know those boxes are getting really long in the tooth, and the failure rate has to be getting pretty high at this point.