Even More About Downconversion
Well, I guess I was wrong last time. In my last post I expressed doubt that cable companies would (given the right to downconvert HD signals to regular digital cable) actually not carry an HD signal. but further posts in the AVS thread I referenced previously have convinced me that this might be the case in certain situations (mostly related to multiple streams in a "must-carry" environment). And so perhaps the "big 4" broadcasters aren't being paranoid after all, and neither is the NAB (who have now joined the fray, as reported in this HDBeat followup).
However, I'll still be surprised if this affects those HD channels that HD viewers actually want to see - but we'll see.