At the moment 3d printers are a compromise – you can either get a comparatively cheap machine that can only make very small parts, without particularly fine detail, in a limited range of materials, or you can spend 10s or 100s of thousands and make larger, finely detailed parts in materials which *almost* meet all your requirements. The parts produced either way will need cleaning to remove the support structure, final finishing and assembly. You’d also have to obtain the correct material(s), purge the machine between material types or material colours and clean it after use.
Even if the machines do get wider acceptance, I think it will still be a niche/hobbyist activity for a very long time.
I don’t have a problem with companies protecting their copyright, and some sort of DRM is probably inevitable, but can’t imagine what product I would want to copy on a 3D printer in my shed anyway – I’m not sure you could make anything bike-related that would be strong enough right now.