Right now, the most popular standard for PC and TV video interfaces is HDMI 2.1, but we can soon expect a switch over to HDMI 2.2 — and that switch is apparently coming sooner than expected.
In other words, if your 4K TV is capable of displaying it on-screen, or playing it via its speakers or a soundbar, HDMI 2.1 is already sufficient for your needs now, and in the future. But what ...