AV1 will win if torrents adopt it...
I personally am super excited for AVIF too. More revolutionary for more people than AV1 video will be? The web will make fantastic use of it in terms of page load times, and reading books in archive.org or something with instant load will be great
I've never seen 10bit h264 used outside of anime, but even there the default seem to be 8-bit h264, at least judging by what the subtitling groups use for their releases.