I presume you're on satellite? I'm not sure if cable has greater bw available...
I have an 86cm CRT (that was "big" a few years ago) and even sitting a couple of metres away it's possible to see blocking. Switch over to "E" and wait for a red carpet promo where there's multiple flashes going off (ie: LOTS of changes from frame to frame, so hard to encode within the allocated bw), it looks absolutely horrible.
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