Fidji Simo, the newly appointed head of applications at OpenAI, anticipates that the user base of ChatGPT will expand to encompass billions of individuals. She emphasizes that the ultimate ambition of AI is to revolutionize the lives of individuals worldwide. Simo envisions that applications in productivity, healthcare, and education will spearhead a surge in demand for AI agents and devices. She is expected to officially commence her role at OpenAI within the year, overseeing a range of operational responsibilities, including finance and product development.