The future envisioned by DRM is an attempt to deal with the problem of copying through structural rather than legal means. Would an update to the law restrict DRM by putting transferability requirements in place (that is, any DRM scheme needs to have the option to irreversibly transfer the content)? Would it put further DMCA-style restrictions on attempts to circumvent DRM?
I don't really like any of these options. I think music is the closest thing to where we have "solved" this problem -- streaming music is inexpensive enough and widespread enough that music piracy is essentially a non-issue.
For a while it seemed like video was going in a similar direction, but now with the balkanization of video platforms and the increasing cost of access to materials, we're slowly reverting back.
Books, especially ebooks, have been totally blocked from this path by the publishers, who managed to successfully defend their pricing moats and make ebooks more expensive than their physical counterparts. Piracy seems (anecdotally) less widespread just because ebooks (especially Kindles) don't make it easy to bring your own content.