Our trip report of the FOSS4G conference is now up, https://cesium.com/blog/2017/08/21/FOSS4G-2017-Trip-Report/, as are the FOSS4G talks by members of the Cesium team:
3D Tiles in Action, by Sean Lilley: https://cesium.com/presentations/files/3DTilesInAction.pdf
Everything old is new again: What open source Google Earth Enterprise means for Cesium and FOSS4G, by Matt Amato, https://cesium.com/presentations/files/gee_foss4g2017.pdf
Why 3D? The benefits of 3D geospatial visualization beyond pretty pictures, by Hannah Pinkos, https://cesium.com/presentations/files/why3d.pdf
2.5D is not 3D, by Matt Amato, https://cesium.com/presentations/files/2.5D-is-not-3D.pdf