I was thinking the other day that power plugs, USB plugs, etc., are a bit of a nuisance when we have things like RFID, bluetooth, wifi, and induction etc., available. Then I was thinking about my electric toothbrush, which doesn't make metal-to-metal contact with its charger; instead, the charger that it sits in is a proximity induction type (ie moving magnet near a wire creates a current).
So I was thinking it might be cool to remove the metal contacts on the charger cable for MacBooks and replace it with a sealed plastic plug, that just induces the charging current in the MacBook. This is good for a number of reasons, not the least of which is that my toddler won't get a shock from sucking the power cable anymore!
Plus, if you get rid of USB ports, etc., you could potentially eventually make a waterproof iPad that I can use to read in the bath, which is what I miss most about paper books.
Here's a sample of something already using this idea:
Thanks for listening.