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> Given the choice between a 4K stream and a 1080p Blu-Ray, I’ll take the Blu-ray in most cases.

Is it really? My experience has been that 4K downscaled seems to make for a very solid resulting 1080p image. I've been kind of thankful for 4K streams in that way.

I generally do freeze-frame comparisons of stills in landscape/conversational scenes, however. It might be different for jittery action sequences?

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If it’s a good 4K stream then yes, it’s fine. The problem is many of them aren’t, whereas damn near all Blu-rays look spectacular even upscaled 1080 -> 4K. Bitrate is the issue, not resolution.

Maybe it's better now, but Blu-Ray looks substantially better in how color gets encoded. It's not a limit in the format, there just isn't enough bitrate in streaming to get dithering-like effects to go through.

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