The future of 3D printing may depend on the ability print things with properties beyond cheap plastic. We've seen composite materials appear for 3D printers before, but the arrival of MakerBot to the scene should make progress a bit quicker. Announced at this week's CES, MakerBot will be rolling out new composite filaments that have been chemically bonded with new materials. You'll have to wait until late 2015, but it's probably going to be worth it: Maplewood, limestone, iron and bronze PLA composites are coming. And in real life, they look and feel far more impressive than you might think.