Then Google Maps is still in App form because... just kidding... we both already know why. =3

confused . There is no native desktop app for google maps. And it does full 3d. maybe you meant on mobile? But you brought up Steam so clearly not mobile

Earth is WebGL now too

https://earth.google.com

Google Earth Pro download link:

https://www.google.com/earth/about/versions/

Probably a bad example, but it is not our concern if Google wants to repeat the VRML/X3D trajectory. Best of luck =3