My cheap 4K TV only has HDMI 2.0b ports which also does VRR (variable refresh rate) , ALLM (auto low latency Mode) and 120hz in 1080p the only thing i don't get with with HDMI 2.0b is 4k@ 120hz as far as I'm aware so not that bothered about HDMI 2.1 or should be called HDMI 2.0c now lol