Post Virtual Reality Sadness
People talk a lot about futuristic sex robots but what about VR experiences that are not only physical but deeply emotional - wherein you experience seduction and actually fall in love?  Think about riding in a weeks long 18 hour a day RPG crusade with a Milla Jovovich lookalike Joan of Arc who, in between battles, is irreparably infatuated with you.  The tech needed to achieve this level of total immersion may yet be decades away but once it arrives it's scary to imagine - love, not sex, being the real emotional Achilles tendon of the human experience.