In this chapter, the opportunity is given to three persons in charge of the planification and territorial and environmental prospective departments of major government bodies—ministries and the European Commission—to express their views. We wished to hear the opinion of these practitioners on the geoprospective approach. How is the spatial dimension introduced in the prospective studies carried out by their organizations? What are the preferred themes? On what types of spaces, regional levels, and at what scale are these prospective works conducted? How are they achieved, using what methodologies and operating modes? Backed by their experience, how do they consider the geoprospective approach, its interest, appropriation by the stakeholders concerned, and the prospects for its spread?