A lot of people don’t want to use ebooks, but have no oversight of their physical books.
Some people love to keep the physical items like books, vinyls, and CD’s. But that usually isn't as organized as digital items. This would mend the physical with digital to elevate what they already love. They get to keep the Physical, but also the organization of the digital aspect
One of the things that isn’t allowed or possible with ebooks is swapping books with others. But that is allowed with physical books and with this they can.