An experimental pen called Lernstift could act as an educational aide for children, teaching them to write legibly and use correct spelling. It vibrates when it detects a misspelling or illegible handwriting. Sure, word processors and other mobile applications are getting a lot of press these days, but this is a reminder many still write with the hand, and tech can still help in this realm.
In the near future you may be able to "write" or gesture in the air to trigger applications and other tech to perform some function. My question: can I securely sign my digital credit card receipt now?