Early on, cyberpunk was hailed as a radical departure from science-fiction standards and a new manifestation of vitality. Shortly thereafter, however, some critics arose to challenge its status as a revolutionary movement. These critics said that the SF New Wave of the 1960s was much more innovative as far as narrative techniques and styles were concerned. Furthermore, while "Neuromancer"'s narrator may have had an unusual "voice" for science fiction, much older examples can be found: Gibson's narrative voice, for example, resembles that of an updated Raymond Chandler, as in his novel "The Big Sleep" (1939). Others noted that almost all traits claimed to be uniquely cyberpunk could in fact be found in older writers' works—often citing J. G. Ballard, Philip K. Dick, Harlan Ellison, Stanisław Lem, Samuel R. Delany, and even William S. Burroughs. For example, Philip K. Dick's works contain recurring themes of social decay, artificial intelligence, paranoia, and blurred lines between objective and subjective realities. The influential cyberpunk movie "Blade Runner" (1982) is based on his book, "Do Androids Dream of Electric Sheep?". Humans linked to machines are found in Pohl and Kornbluth's "Wolfbane" (1959) and Roger Zelazny's "Creatures of Light and Darkness" (1968).