It's interesting to think of the reasons we don't have browser-based 3D renderers. Sure, WebGL exists. But it seems like the promise fizzled out, and I'm not quite sure why. Maybe it's as simple as "Steam is the money pipeline, and everyone makes native games on Steam."
Now Blender is really good we’re seeing a lot more indie games exploring low-poly 3D aesthetics. Further the increasing viability of using more compact formats like SDF hopefully means we see even more people realising they can actually build something on the web.