It's also got terrible resolution -- on the order of tens of DPI. It's slow. And it breaks down constantly. (I've heard the makerbot nicknamed the "breakerbot" thanks to it's constant failure).
Open source 3d printers are great hobbies. I love them, but they're certainly nowhere near production ready.
Probably because cheap 3D printers just melt plastic and drip it on the right spot.
I think the most sophisticated part of a laser printer is the toner. It has to stick on the drum but also on the paper at the right moment and at the right temperature. And it should stay on the paper for a long time without loosing it's tint.
Maybe they should build an open source laser cutter weak enough to just burn the surface of paper.