Through the Cesium Ecosystem Grant, the Web3D Consortium is enabling X3DOM to stream massive geospatial datasets—terrain, photogrammetry, buildings—directly into declarative X3D scenes. This work strengthens alignment across X3D, glTF, and OGC 3D Tiles, creating a seamless, vendor‑neutral pathway from data acquisition to web deployment. For users, this unlocks scalable digital twin experiences, richer metadata‑driven visualization, and a more interoperable 3D ecosystem built on open standards that will endure.