Why you should get a 4K streaming box even if you don't have a 4K TV

Just as we collectively transitioned from standard definition to high definition earlier this century, the TV industry is making it pretty hard to avoid upgrading to 4K. The ultra high-def display format is present in pretty much all TVs bigger than 40 inches or so, and they've become so affordable that you might as well get one even if you don't care about the jump in resolution.
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