I would imagine that when we get to the stage that a 3D printer can print out a smart phone for example things will have changed. Even if you have the file for your phone for free from the internet legally or not you are still going to require the materials to put into your printer. This is where the money will be made, i predict that for a lot of things more money will be made on the raw materials than the objects them selves. I'm sure i read about open source cars,beer all sorts. By that point you could potentially have AI programs that could design you a car or any thing as easily as we now use simple web site design software. Also with music i see a movement from standard music to alogrtham based interactive musical environments. These would still be created by artists but would not be a fixed period of music such as we have now, so copying it would be pointless. (that last one still needs a bit of work). Obviously 'normal' music will always be with us just as classical is.