Technology has been out for a few years, but it always getting better. I got to see several of these printers (made by different companies) at the MDM convention - fascinating stuff.
Some of the uses of these are replicating bones for surgery (from scans of the people), printing unique tools (like the video), and making shapes that are hard to tool (for example, there is a printed glider that uses a tail design that uses a special curve that would be too expensive to make otherwise).
We have a ZCorp 3D Printer in the prototyping lab at my school (I'm Technology/Pre-Engineering Education Major). I've used it a couple times and it really is awesome, even though it is a few years old and thus old technology. It can print objects with moving parts, like ball bearings or a castle with a swinging draw bridge.
We are working on getting an ABS printer that prints 3D models in plastic as opposed to the more brittle material printed by the ZCorp we have. Very cool technology.
You just give it the 3D image which it reads as many layers and then prints it by layer. I didn't watch the video so maybe is wrong but I think it needs a 3D image file with all the infiltration and you can't just scan something and it is print.
Two Plus Two
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