Thank goodness I found where my reply to the main thread for some reason got moved.
Good news: A few days after "a Comcast customer support supervisor who said that they won't let me out of my contract", Comcast phoned ME persuant to my FCC complaint and let me out of my contract.
As for the replies to my post...
@Rustyben Your reply is not at all responsive to my post.
@eecon1 I can't tell for sure, but I sure hope your post was intended to be humourous!
@haneybd87 The compression problem is good to know about, thank you very much!
@SLannes I'm guessing you aren't joking.
I'm imagine that for SD content, a SDTV could look as good as an HDTV (or better if the HDTV is set to fill the whole screen with it instead of display the content in it's 'actual size').
But there's an underlying irrationality to your thesis: SD content only has 480 vertical lines of detail (that's why it was fine to sit on the other side of a big room from it). HD and UHD have 1080 and 2160 vertical lines of detail, in other words they by definition are content which enable higher picture quality (aka higher definition /resolution) if one sits less distantly so one can percieve the much smaller screen pixels and thus much greater resolution.
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