Fei‑Fei Li’s Three‑Category World Model Taxonomy and the Fusion of Rendering, Simulation, Planning
The article clarifies the overloaded term "world model" by presenting Fei‑Fei Li’s functional taxonomy—Renderer, Simulator, and Planner—tracing its roots to POMDP theory, comparing their outputs and uses, highlighting current commercial focus, challenges in data and fidelity, and the emerging convergence illustrated by World Labs’ Marble.
