Replcating robot, replicates "anything"
Including more robots like itself, circuit boards, many things "ranging from a few millimeters to a few centimeters". And if larger objects were desired they could be assembled from smaller pieces.
Imagine if you had one computer with the design for some great new product, one of these robots, and a bunch of material. Tell one of these robots to endlessly build copies of itself, while all the newly created ones start working on your product!
The cost of one of these guys right now is $45,000 so thats gonna come way down before it can help the "poorest communities by alleviating the need for the sort of large-scale industrial infrastructure" as said in the story on CNN.com