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HDMI 2.1 is the latest widely available version of HDMI, the high definition audio/video interface that’s been the gold standard for connecting media sources to your TV since the mid-2000s. Since then, there’s rarely been a need to upgrade your HDMI cables, but if you want to display the highest quality footage on your television as this technology advances, you might need to.
Although the HDMI port itself hasn’t physically changed over time, newer versions…
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News Source: www.popsci.com