3D-printing is all around us. This futuristic technology, that has been around over two decades, is only now showing up in the mainstream. Additive printing, as it is scientifically called, is explained in this educative 10 minute video, if you've not seen it yet (I expect not, since it has had only 743 views at the time I'm typing this). The applications of this technology are incredibly diverse - as this team at Cornell University demonstrates, but using it to "print" meals for astronauts. Agree or not with the concept, 3D printing shops will be as ubiquitous as the corner "photocopying" shop used to be in my not so long past.
