Cesium is going to continue to broadly support developers building 3D experiences with the natural and built environment. Just like the geospatial community showed us that our aerospace library was useful to geospatial, and then we kept (and even expanded) aerospace - our plan is to do the same once again; the Infrastructure community has showed us that our aerospace/geospatial platform is useful and Infrastructure becomes additive. The visual in the blog aimed to show this, see below.
As for aviation and global scenery side - I dig it - and a lot of core advancements help everything like what we are doing for visual quality in CesiumJS with glTF PBR, IBL, AA, etc. Please share requests anytime on the forum or GitHub.
Thanks!