A couple of months ago I decided to temporarily swap my 4K 55" smart TV with my Step-Dad and Mom's 40" dumb 1080P TV that I had purchased for them as a Christmas gift. They need a bigger screen more than I do. I watch most stuff on my computer anyway.
Comet TV is one of the few broadcast stations that I can get. It broadcasts re-runs of Sci-Fi TV shows and mostly terrible Sci-Fi movies. I occasionally watch shows on it.
Unfortunately, Comet TV broadcasts only in 480i, which is also the same resolution as videotape and CRT televisions. On my 4K TV, it looks absolutely terrible. Surprisingly, on the 1080P TV that I am now using, it doesn't look so bad.