Really nice! I did a quick test some weeks ago and apparently using google street view images to generate Gaussian splats works quite well: https://www.instagram.com/p/C2xozxVAdpG/
(I just took screenshots of the Street View, not the API, so the ground is falling apart a bit because of the street names.)
Agreed tons of potential here, however we may need to get our own geo data for this: Google was very clear during the API quota approval process that 3d tiles cannot be used for ML training or generation of derivative assets like Gaussian splats, at least with this specific product offering.
(I just took screenshots of the Street View, not the API, so the ground is falling apart a bit because of the street names.)