Are all TVs HDMI 2.1 compatible?

You will be able to connect any HDMI-enabled device supporting any older version of the HDMI standard, and it will work just fine on a new HDMI 2.1-enabled TV or display. Ultra High Speed HDMI cables are backward-compatible too. … Nothing is changing about the size or connection type of the HDMI cable ports and jacks.

Is HDMI 2.1 a must?

HDMI 2.1 might have the biggest impact on the world of gaming. Especially if you have a next-gen games console, like the PS5 or Xbox Series X. Both of these new consoles must have a TV that supports HDMI 2.1 to work properly.