From CNET: The forthcoming HDMI 2.2 standard will bring more bandwidth, a new way to get a handle on lip-sync errors and a new, backwards-compatible cable, the HDMI Forum said at CES 2025.
The good news is, most people likely won't even need to worry about HDMI 2.2 since the increased bandwidth won't be used by any mainstream TV, also, while the lip-sync adjustments are potentially useful, they might not be necessary for your system. The new higher-bandwidth cables, thankfully, won't be required in most situations. That said, it's still good to understand what's coming.
Bandwidth is how much data can pass between two devices. Essentially the size of the pipe to carry all the water (data). HDMI 2.2 doubles the size of the pipe, going from HDMI 2.1's 48 gigabits per second to 96 Gbps. This allows even higher resolutions and framerates. Resolutions and framerates that your TV can't do anything about. Even if your TV can accept and play back a 4K120 signal, or even an 8K TV with some mythical 8K60 source, HDMI 2.1 can carry that amount of data with no problem. That spec can handle up to 10K resolution, and there's no TV that can display that.
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