What's the point of HDMI 2.1?

What does HDMI 2.1 bring me with the Xbox Series X? (or should I stay with the Xbox One S)

My TV is about 3 or 4 years old so I only have HDMI 2.0 (I think)

There's a serious security risk…

I would wait for the fix at the moment.

?

Please what?

Broken Google?

Nope but if that's your answer it would be a little more helpful with a little more info!

Heise.de

for everyone whose Google is broken too.