Some TVs supporting the full HDMI 2.1 48Gbps ports can handle 4K @144Hz uncompressed and some 4K @240Hz using DSC. HDMI 2.1 featured AVRs are limited to 40Gbps. So, maybe AVR makers will just skip the full HDMI 2.1 48Gbps ports and go with the new HDMI 2.2 ports very soon. But, I wouldn’t bet on it. It is a non issue for those without a very good PC connected to their AVRs.
Those who use AVRs for 4K streaming, BlyRay movies and other media content will not need to worry about HDMI 2.2 at all. This part of the industry is not going there any time soon, as this media content does not require so much video bandwidth.
The first adopters of HDMI 2.2 will be TVs and monitors for console and PC gamers. And this is why new AVRs will also need to develop new HDMI 2.2 boards, just like they did in 2020 with HDMI 2.1. The same process. Console and PC gaming is a multi-billion and lucrative entertainment industry. Game developers, PC and console makers, as well as TV and monitor makers know this very well. So, Sony, Microsoft, LG, Samsung, Intel, Nvidia, AMD and others will be pushing hard this ecosystem. AVR makers do not have much choice here if they want to remain relevant with future AVR machines in this fast moving market.
AVR makers will very much skip wasting time and money on developing 48 Gbps chips for video boards. They are late with those full speed chips 5 years already... They will move directly to HDMI 2.2 video boards, as new consoles, graphics cards, TVs and monitors with those ports will be ready around 2027.