Three Laws of Robotics card-readers in "The Caves of Steel" have a capacity of only a few kilobytes per square centimeter of storage medium. "Aurora", in particular, presents a sequence of historical developments which explains the lack of nanotechnology — a partial retcon, in a sense, of Asimov's timeline. There are three Fourth Laws written by authors other than Asimov. The 1974 Lyuben Dilov novel, "Icarus's Way" (a.k.a., "The Trip of Icarus") introduced a Fourth Law of robotics: Dilov gives reasons for the fourth safeguard in this way: "The last Law has put an end to the expensive aberrations of designers to give psychorobots
Sci-Fi on the Rock numbers, the festival grew in other ways. For example, in May 2009 (almost immediately following the past festival), Sci-Fi on the Rock opened an online store on their website. Also, Due to the success of Hann Made Film's first fan-film, "Star Wars: Inner Demons", Hann Made Films filmed another fan-film, this time a Stargate SG-1/Doctor Who crossover film, titled "Replication". The film debuted at Sci-Fi on the Rock IV, to great reception again. Also, Sci-Fi on the Rock and HannMade Films teamed up to create "Sci-Fi on the Rock TV", a video magazine that provided festival updates on an "almost