Why is 2160p video called 4K?
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4k is vanilla big screen 16:9 cinema aspect ratio. 4096×2160. While you can get true 4k TVs, they are super rare and most TVs use more common blue ray UHD standard in 16:10 with 3840×2160. It works better in most rooms and the small black bars on the top and bottom of the screen won’t bother anyone. Especially since we are used way bigger size cuts in okd 4:3 TVs. For old 4:3 TVs. When film studios began marketing the term 4k, home entertainment industry had to put it on their UHD devices too so people understand quality will be the same, just in a slighty different ratio. (with a few pixel black bars)
Many people get this wrong when buying a TV and think bigger is better. But truth is that the viewing distance to size ratio is the most important thing after deciding to go for UHD.
A 65″ UHD TV will look worse than a 43″ UHD when sitting to close to the TV. However sitting to far from a 43″ TV will make it hard to spot details you’d be seeing with a bigger 65″.
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