At a minimum, eARC requires that both an audio device and its connected HDMI port support HDMI 2.1. If you're unsure, check your audio gear's specifications, and connect it to the port marked "eARC" ...
It's not just resolution. Increased bandwidth means higher refresh rates that dedicated gamers crave and need for the latest, open-world immersive realms. HDMI 2.2 looks to support 4K at 480Hz, 8K at ...