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Well, it's a bit of a chicken-and-egg problem, so maybe this is the egg. I can definitely see various emulators taking advantage of this for RetroPie and the like.

Also, as the article mentions, there's a fork of Android that runs on a Raspberry Pi, and there are already Android games that will take advantage of Vulkan 1.2 support.

You don't need the game itself to actually support ARM. Box86 (runs x86 on ARM) already works with plenty of games, and it will even work with Wine and DXVK to run Windows games: https://youtu.be/JuRZGf7Jqxg

Also probably Android games.

Don't browsers and video players use it?

Various emulators, for one.