Wikipedia is a sort of online encyclopedia on the Internet. The Wikimedia Foundation, Inc, which is an American non-profit and charitable organization, manages and runs every language website of wikipedias. Although they have become huge and popular for humans, they also have some shortages for machines in the viewpoint of Semantic Webs and LODs. Aiming to propel the reuse of wikipedias for Semantic Webs and LODs, this paper discusses the pros and cons of Wikipedia, the current status of research and development from Semantic Web views, and forecasts the future in the direction of Wikipedia for humans to Wikipedia for machines.