I don't know of any medical implications of lucid dreaming, if there are any, because lucid dreaming is such a mental thing. It makes people realise there sleepwalking, so they won't fall down the stairs? Maybe it helps fight Alzheimer?

An awesome way that lucid dreaming will help society: Lucid dreaming can greatly improve creativity. For instance a dream character might propose an idea to you that you would never have thought of yourself.

Good Luck!