I'm pretty sure that's just what people who can't afford big TVs say to make themselves feel better.
Or people who sit way too close to their TV.
One of the two.
Nah because I have a big HDTV and a small HD one at home (well not necessarily mine but my parent's and stepbrothers so that devoids your argument entirely) and I can still clearly see the difference between the old small one we still have and the small HD
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