Nobody broadcasts in 1080p yet because it takes up too much bandwidth and the benefits aren't noticeable to hardly anybody.
I prefer a progressive signal of lower resolution to an interlaced signal of (sort of) higher resolution because I notice interlaced motion blur more than I notice any added clarity from the resolution, especially for something like a film transfer that comes across at 24 frames per second and has to go on a 30 or 60 fps display. 1080i and 720p are almost exactly the same amount of screen information, I just prefer it to be non-interlaced.
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