Even so, when a show is broadcast on an HD channel, the signal coming from the station towards the broadcasters is not an "SD" feed, it is an "HD" feed on which the older studio tapes are played. Even way back when in the 80ties, when we were watching our shows on big tube TV's through analog cable or antenna, the actual source transmission from the TV station headquarters to the carriers was of a higher (albeit anaolog of course) quality, and closer to the quality of the source tapes. When you watch an SD sitcom on an HD channel, the qaulity is better then when you would watch this same sitcom on an SD channel, as the broadcast tapes that are eventually, all the way back in the TV station building, being played are better quality. Of course nowadays there is no more tapes in those TV station buildings, but it is digitized and just played from a large datacenter. In short, the "HD station displaying an old 80ties SD show" offers an image-quality that is much closer (or almost just as good) to what is being played in the actual TV studios for broadcasting to the carriers. There are indeed.... some golden opportunities for shows that are shot in 35mm film. They did it with Seinfeld, which did not air one single episode in HD during its original run, but can now be seen in HD on TBS and (I believe) Fox. Star Trek: The Next Generation could also be remastered in HD, and I would records and watch the entire series AGAIN (and I have already seen it fully at least 3 times) when it is shown in HD.