Siri creators Dag Kittlaus and Adam Cheyer envisioned a "do engine" that executes tasks rather than just searches. Apple acquired Siri in 2011 for over $200 million, but kept it limited to simple functions until now. Apple is rolling out a rebuilt AI-powered Siri in iOS 27 that can analyze screens, operate apps, and access personal data, bringing the assistant closer to the founders' original vision while competing with ChatGPT and Google Gemini.