The Who today confirmed they are postponing all remaining dates on their "The Who HITS 50!" North American tour, including an Oct. 17 stop at Detroit's Joe Louis Arena.They had initially postponed four shows on doctors orders after Roger Daltrey contracted a mystery virus. It was hoped that the rest of the tour might proceed, but after extensive tests the seriousness of his condition became apparent when doctors diagnosed Roger as having viral Meningitis and prescribed a period of rest.