You know, I wish bicycles transformed into more things. Sure, they're handy enough getting you where you need to go, but designer Natacha Lesty's "Bike or Bag" morphs into a shopping cart, making it useful throughout your trip.
The other thing I like about this design? I wouldn't have to lock my bike up, either, I could just keep it with me. That, and you don't have to precariously balance all of your groceries or what-have-you for the ride back. The storage area of the bike is there both when you're riding or when you're pulling.
Look below for an image of Lesty's bike all folded up.