Ease of use
Many RegHardware readers will probably find the features in these sets far too restricted for them, but some people might find a niche. For example, if the other half doesn't want the bedroom cluttered up with gadgets, a DLNA-compatible set means you could still have easy access to the porn collection. Pressing a button and selecting 'media server' to view the photos your clever partner's popped on the NAS is pretty simple to get to grips with.
Just as some people prefer a built in Freeview or Freesat tuner to what they feel as unnecessary wrestling with AV inputs and multiple remotes, even when that makes recording simple, so some will find even a limited built in set of functions simpler to get to grips with.
I would imagine that's a scenario familiar to any RegHardware reader who's tried to explain over the telephone to a less technically aware relative how to get the picture from their digibox to appear. Of course these aren't perfect, but there may well be some people for whom they'll do the job.
Analogue receivers are dirt cheap; it's probably easier to leave them in pan-european models, and some people out there will still be using devices connected via RF.