Yep, webassembly is giving web and js devs access to the power of the gpu, such as your example of 3D rendering in realtime. This creates the potential to run ai inference on the edge (on user's computer) with cross compatibility across platforms and browsers, meaning no need to target each platform - iOS, android, windows - with a native app.

The other potential that webassembly - which I know less about - is enabling safer and more secure application, maybe delivered as progressive webapps. If i recall correctly this is something supertestnet was talking about on a podcast - write a js implementation of lighning with webassembly - and something Mutiny wallet might be doing?