The 1979 Star Trek motion picture is quite prescient, predicting the singularity that is the merging of human mind and machine mind. (too many m's =P) It's looking more possible today than before...
No wonder, Isaac Asimov was on the scientific advisory board. Perhaps Prof. Marvin Minsky does have the right idea about serializing a science fiction writer consortium. Jules Verne's book about Paris in the 20th Century mentions technology that didn't exist in the 19th Century but are here now.
In his book, Michio Kaku talks about stretching the imagination just beyond the edge of possibility and whatever is currently in existence. There's no existing physical law that forbids teleportation, telepathy, force fields in the style of Star Trek, invisibility, etc. Which means that these phenomena could very well arise in the next few decades.