Question: do you have to have 4k hdmi cable for 4k tv?
Answer: You do not need a new HDMI cable for Ultra HD 4K (probably). We're well into the transition to Ultra HD "4K." Most mid- and high-end TVs are now Ultra HD resolution, with many also supporting HDR. ... But guess what -- you probably don't need 4K HDMI cables, because your current ones can likely do 4K just fine.