Recently I was thinking about how a lot of laws in various place has a copyrighted piece of information enter the public domain after a certain number of years after the death of te author. If such laws existed in a society with immortal people, that would mean that works created by immortals might never enter the public domain. Unless evidence of the authorship was lost to the ages. (Of course, if information doesn't necessarily last forever, the work of art itself might be lost to the ages, too.)
Do you think that copyright laws might be rewritten in such a way that information's transition to the public domain won't depend on the deaths of their authors? For example, if they simply were to enter the public domain 120 years after they were created?