Context and motivation: AI-based systems (i.e., systems integrating some AI model or component) are becoming pervasive. A number of characteristics of AI-based systems challenge classical requirements engineering (RE) and raise questions not yet answered. Question: This vision paper inquires the role that RE should play in the development of AI-based systems with a focus on three areas: roles involved, requirements’ scope and non-functional requirements. Principal Ideas: The paper builds upon the vision that RE shall become the cornerstone in AI-based system development and proposes some initial ideas and roadmap for these three areas. Contribution: Our vision is a step towards clarifying the role of RE in the context of AI-based systems development. The different research lines outlined in the paper call for further research in this area.