While the Mac Firefox 109.0 can support 8K SDR AV1 with the below videoI will ALWAYS take an update for the Apple TV. Always. Even if it is just a spec bump on the chip and nothing more.
8K support has more to do with media/content than hardware. I'm sure the hardware is about there now, but how soon will Apple and all other streaming services be streaming 8K? I don't think we're there yet. Maybe not even next year.
I thought I read that Technology Preview 161 added experimental support of AC1 or AVIF support in Develop menu.
Below is a useful status of browser AV1 support
The assumption is Apple on AS SoC's could make it happen but is procrastinating such as A15 APTV 4k via a tvOS app.
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