In the last years computer graphics, hypermedia and telecommunications were applied in exploitation of museums, art galleries, architecture and other kinds of works of art. Network access to museums and galleries seems to offer both easier access to cultural heritage and new revenue for its preservation and display. Many relevant players both in the Museums and ICT communities invested time and resources creating pilot projects and applications ranging between 3D reconstruction, image based rendering and virtual museums. We are now in a position to consider if such investments are effectively useful and really increase and diffuse knowledge in the arts, sciences and history and if they satisfy users’ requirements. Do virtual museums reall...