OS-level user models, not foundation models, will be AI's most valuable asset

sarahcat21 · x · 2026-09-01

Rohan Virani of Amplify Partners makes a provocative call: over the next decade, the most valuable asset in AI won't be foundation models but OS-level user models.

The core argument: once action-taking becomes abundant, the scarce resource becomes proactivity — knowing what to do, when, and whether to do it at all. YouTube, Amazon and banking apps already pre-empt needs via rich user models, while AI assistants still push the entire prompting burden onto the user. Ideally the model should share that burden and solve problems users never knew they had.

The post traces the HCI research underpinning this agenda — from Eric Horvitz and Marc Weiser in the 1990s to recent General User Models that train foundation models to anticipate human action — arguing OS-level user models may become the most contested digital real estate of the next decade.

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