Recycled materials is a catch 22 for the large 3D printing companies like 3D Systems. They actually make a ton of their money on Filament so if they were to put out some sort of garbage to filament machine it would hurt their filament sales.

I do however think this is the future. Image being able to put your aluminum cans in the machine and turn them into practically anything. Same for plastic bottles, or perhaps even glass. Amazing that they plan on having something out by year's end. Things are really starting to take off!