He is the personalized authority for that kind of important knowledge which has a relevance for human action. This is one of the main tasks of museum policy at the beginning of the 21st century. The relation between virtuality and reality has changed. The question of the medium is rarely of interest nowadays. Interactivity can produce a specific relation to reality.
Traditional categories are no longer valid, even though they continue to exist.
Other special fields, such as genetic engineering, cybernetics, artificial intelligence, cyberspace, as well as ecology, sociology and politics are introduced. The traditional understanding of chronology disappears. Technological development and the media combine past, presence and future. The world becomes a museum. Nowadays, one of the main tasks of the museum is to critically deal with the possibilities of electronic reproductions.