For example, an older 1080p60Hz TV receiving information from an HDMI 2.1 cable will still display images at 1080p60Hz, and a 4K60Hz TV will display 4K60Hz. The opposite is not true, however.

HDMI 1.4 tops out at 4K 30Hz or 1080p 60Hz, HDMI 2.0 bumps things up to 4K 60Hz with HDR, and HDMI 2.1 unlocks 4K at 120Hz, 8K support, eARC, VRR (Variable Refresh Rate), and ALLM (auto low ...

Nintendo says your old Switch HDMI cable isn't compatible with Switch 2, but since that's not strictly true, I'm here to clear things up about TV connectivity.

The HDMI 2.2 spec now supports up to a whopping 16K at 60Hz, and 12K at 120Hz. For uncompressed formats with full 4:4:4 chroma and 10-bit and 12-bit color, it can handle 4K at 240Hz, and 8K at 60Hz.