Fei-Fei Li’s World Labs speeds up the world model race with Marble, its first commercial product

Fei-Fei Li building persistent downloadable worlds is the inflection point. On-the-fly generation (Genie, etc.) is cool but useless—you can't build game engines or sim platforms on sand. Marble's different because you can actually iterate on a world, share it, version it.

That's the difference between a toy and a product. She's not racing to bigger models. She's racing to infrastructure that lets you use models. Honestly, this is how you win the spatial computing game—not through GPUs, through persistence.