It's a problem now, of course, because people can already mass-produce copies of original works, and sell them without a licence.
With 3D scanning and printing technology it is more likely that there would be potential for patent infringement - someone could make copies of a patented product in a garage, and sell them at car boot sales, for instance. Fake products already find their way onto the market of course, but as time goes on, and the technology becomes more sophisticated, cheap 3D scanners and printers will provide an easy way for anyone to make counterfeit items.
We already have an easy way of counterfeiting items, it's called China.
But let us hope that manufacturers do not follow the same path as the film and music industry by ignoring the technology with all the problems that has caused.
Yes there will always be people who want everything for free and you will never stop that. But the mishandling of digital technology by major music and film studios should be a great lesson on how not to do things, companies should now be looking on how to use this new technology to their advantage rather than play catch up as by that time it is invariably too late.