So, why would you ever want to make your fingertip magnetic? Well, how about being able to feel your laptop spinning up? Or sensing if a cable had a current going through it? Think of it as a sixth sense.
Ever thought of getting yourself a permanent pair of Star Trek Vulcan ears? A day trip to the plastic surgeon can get that done for you. This body modification is said to enhance the music listening experience, but then, you have to go around looking like Spock to enjoy that questionable benefit.