Simulating everything, sort of: The promise and limits of world models

Experts explain how they work, what they can do, and what's still unsettled. https://arstechnica.com/ai/2026/07/simulating-everything-sort-of-the-promise-and-limits-of-world-models/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social