Few months back, I was chatting with a lady on IRC who was in a theater waiting to see a live broadcast of a [//////] concert.
(don't 'cha love IRC over Android phones?) - :up
We found it on a feed satellite, and it wasn't encrypted.
Probably too many theaters had trouble getting their decoding working.
Or maybe the fact that it was a one-time deal, meant nobody was gonna see it.
Anyway, the HD picture was just two images side by side.
Kinda cut down the picture resolution, but it worked for the big screen.
Without a 3D-capable TV, it wasn't that interesting.
So, while there may not be FTA-targeted programming for a long time, I can see where there could be feeds show up.
Don't think anything special was needed for the receiver; just a special TV set.
edit: on second thought, we don't need to say who the musical group was.