The increasing instrumentation of the design process can transform it into a site of virtual: architectural, structural, psychological, sociological, experimentation. Thanks to that, architecture that was never thought as a scientific discipline seems at last to enjoy a virtual laboratory of pure research. This visionary space of experimentation of potential architecture must assure the return of performances obtained in the constructed environment. But, to make such a future certain, one has to start with pedagogy, where the laboratory of potential architecture must constitute a real construction site of the imaginary.