CZML streaming server/client code for massive 3D bulidings?

I’m quite new to Cesium. I’ve explored it’s documentation and surfed the web looking for 3D buildings vvisualization examples with Cesium, but I haven’t found very much. I’ve read the EventSource and Streaming paragraph [1] but I haven’t found any working implementation. Is there something ready to provide streamed 3D content? It would be great to have providers like for terrain, and maybe, one day, a WFS based provider like the Geoserver Terrain Provider plugin…