We are attempting to solve a software problem with "hardware" (hard-copy). Yes, PDFs and the like, were the first step to a paperless office (which will never be 100% paperless). The next step is a standard for storage, lookup, organization, and the CIA-triad. We all complained about PDF being tied to a single company--which is a debate that must be had at every step--, but unfortunately, I don't see a way forward without another single entity developing the entire system. I imagine PDF will remain the 'paperless standard,' but as Adobe has yet to step up their game, another company (or OS org) is necessary to make the transformation.
Also if Adobe did it, they would probably screw everyone over (or attempt to) by integrating it into the CC platform w/ ongoing fees.