Lucid dreams used to be a topic within psychical research and parapsychology. Perhaps their incomprehensibility made them good candidates for being thought paranormal. More recently, however, they have begun to appear in psychology journals and have dropped out of parapsychology-a good example of how the field of parapsychology shrinks when any of its subject matter is actually explained.
Lucidity has also become something of a New Age fad. There are machines and gadgets you can buy and special clubs you can join to learn how to induce lucid dreams. But this commercialization should not let us lose sight of the very real fascination of lucid dreaming. It forces us to ask questions about the nature of consciousness, deliberate control over our actions, and the nature of imaginary worlds.
(via Bruce Eisner)