Until recently for me, 3D printing has lived in the same realm as Lenticulars and Augmented Reality... a technology with masses of potential, but on the whole, really rather underwhelming.
It would seem that 3D printing has come forward leaps and bounds. Not only is it being used for industrial prototyping, but is now being opened up to the masses with companies like Shapeways marketing a print-your-own product service online.
Science fiction has an uncanny habit of becoming science fact. Remember replicators in Star Trek? Or in The Fifth Element where Leeloo's body is 'rebuilt' from a tiny fragment? Perhaps its not too far away... but for now, we will have to make do with a 3D printed shoe or bicycle.