Sure, I agree that 3D printers have a future as children's toys (I wrote that towards the end of my blog post). But the factory-at-home idea where you print cheap objects in order to save money/time is not realistic.
Sure, I agree that paper printers have a future as toys. The printer-at-home idea where you print cheap books in order to save money/time is not realistic.
Do the majority of people print books themselves at home? Not in my experience. And if they did, they'd waste both time and money and have an inferior product.