The document outlines a roadmap for the evolution of Fab Labs and discusses their role in sustainability, self-fabrication, and smart cities. The 4 stages of the Fab Lab roadmap are: 1) workshops with machines, 2) Fab Labs that can produce other Fab Labs, 3) digital assemblers at the microscale level, and 4) programmable matter. It also discusses how Fab Labs can help make recycling, collective design, and informal settlements more sustainable through approaches like Green Fab Labs that focus on local production and sharing of objects, machines, food, raw materials and energy.