Artificial intelligence and language

The concept of artificial intelligence has been around for a long time. In written fiction, AI characters show up in stories from writers like Philip K. Dick, William Gibson and Isaac Asimov. Sometimes it seems like it's touched on by every writer who has written sci-fi. While many predictions and ideas put forward in sci-fi have come to life, artificial intelligence is probably the furthest behind. We are nowhere near true artificial intelligence as exemplified by the characters mentioned above. Sometimes it seems like we've been waiting forever.