I think this is a Dunder-Mifflin move though. "3-D printers are great. We sell paper! Success" I love the MCOR concept, their models are just such a bizarre fit in the market. All the drawbacks of paper, all the cost of 3-D printing.
I'm not real familiar with Mcor's technology, but they claim the results are like wood, which seems like it would be good enough for a lot of the use-cases people are using PLA and the like for.
But more than that, sometimes you just want to bring your 2D printed page to life for presentations and things of that nature. Paper-printed 3D models would be perfect for that. Given Staples' primary audience, I would assume this it he market they are really going after.
Especially for things that you kind of need to touch. If you are designing something physical it could be a cheap alternative to whatever the current mockup methods are.
They're not in wide circulation. People were wondering if they were vaporware actually - but I've only see parts once, and they were pretty good. People still use the old Helisys machines that there's corporate servicer of them: