the practical limitations of 3d printing are many and varied, all the while the whole process of proper injection moulded parts is rapidly improving. Yes, that’s right: hardly anybody realizes that even though 3d printing is getting better all the time, injection moulding is also continuously improving and reinventing itself too. Going all ‘Wired’ by focusing on the eventual promise of 3d printing will likely cause you to miss out on the real manufacturing revolutions that are happening right here, right now.
— Aiming (much) higher than Hackspaces and FabLabs… « Funding Startups (& other impossibilities)