I came across this specs comparison chart for all the various HDMI versions :
source: Tech Chap
eARC and Dynamic HDR jumps at me....
Something to take note on when buy new equipment
I also came across this article about 2019 TV models with HDMI 2.1
https://hdguru.com/hdmi-2-1-features-in-2019-samsung-lg-tvs-clarified/
Important features needed....explained