This HDMI cable is thicker than Belkin's ULTRA HIGH SPEED HDMI(2.1) cable, but a lot cheaper. I don't know of any product from 2018 or earlier that requires this HDMI 2.1 version. I have an LG E8 OLED TV and an Apple TV 4K and you don't need this cable to display DOLBY VISION properly. Just make sure you have the latest firmware update for any Dolby Vision product. This cable is more for future TVs and devices.