Tyler McNaney, the engineer behind the project, saw an obvious disparity in costs between 3D printer cartridges and their material. Right now filament cartridges cost upwards of $35 a spool, despite the fact that plastic needed to produce the stuff is abundant and cheap. So he designed the Filabot:
This is the type of thing that, if widely adopted and pursued, could be a game changer for 3D printing. Imagine this device attached directly to a 3d printer, the spool on a conveyer fed directly into a Makerbot Replicator 2 or BFB 3Dtouch and voila, you have yourself an at-home manufacturing plant. The fully-built Filabot was a reward on the campaign for $490, so unfortunately this kind of consumer tech might not pay for itself just yet, but the future looks bright if this takes off.