In both cases the apps are able to render this imagery in real-time as you use the product, enabling you to view the buildings and streets from various angles and altitudes.
The ILM guys have a deep fascination with realtime rendering (30 frames per second rather than potentially long render hours for 1 frame) and the LucasArts guys have loved exploring what is involved in rendering photo real characters and environments, and we can significantly increase our rendering fidelity.