Imaginary futures soon become outdated in a fast-changing world. And the nearer they are to the present, the faster they decay. The futures that suffer most are those so immediate as to be seized by the present and hauled aboard, annexed into the cultural matrix. Though the present cannot simply reach out and grab the hypothetical hardware imagined by science-fiction writers, it can lay firm claim to the softer aspects of the fiction: the attitudes, the ambitions, the vocabularies of words and ideas.