WebGPU is the lowest common denominator over ancient mobile phones and modern hardware; as well as Vulkan, DirectX and Metal; effectively making it an ancient-mobile-phone-graphics-API. It is at the time of its releas as outdated as WebGL was when it came out.

Additionally Chrome sabotaged the WebGL 2.0 compute effort in name of WebGPU, which 5 years later still isn't fully available.

However despite all of this, there is hardly any Web 3D experience, or game, at the level of iPhone games from its OpenGL ES 3.0 glory days, like Infinity Blade, from 2011!