I would hope that the friend or family member that is asked to ask you 'what's a reality check?' has had a lucid dream before or they might think you are nuts! However, I like your idea. Our big human brain processes the previous day's memories during sleep and dreaming; filing away what is important and discarding what it deems is insignificant, so in theory it could work! Anyhoo, let me know how it works out for you. BTW, the iPhone idea has been around a long time.