At the present time, 3D appears to be the next possible candidate for a "List of ... not available" I mean, there has been already a little I'm-one-step-ahead-of-you going on in the 3D technology - IT all started when D* announced the launch of the 4 or so 3D channels in June. Then Comcast kinda stole their thunder with the Masters in 3D, but Cablevision beat them all(not that Cablevision really competes against COmcast) by showing a Rangers game in 3D.
In fact, I am really curious if Dish has any plans to show 3D content - I can't recall reading them. TO my surprise, Fios is also late in the 3D game, their announcement said something like later/end of the year.
I think Dish and other providers holding off on 3D may be smart. I don't think 3D is going to be the step in at home technology...it has too many hurdles to overcome first. I think 3D will become the next wave in gaming technology and soon, but for TV viewing it'll be a long time before it's mainstream.
As consumers, we just gone through one major transition with HD. Most of us have LCDs or Plazma sets that are only 2 or 3 years old and we're not ready to run out and buy a replacement because of 3D. Look how long Blu-Ray has taken to catch on because of it's price points and the fact that most felt that it didn't really increase the PQ enough to justify the cost difference compared to an up-convert DVD player.
I feel we need to work on improving our HD broadcasts. Both in numbers and quality before we go on to 3D.