The one place where I do think Kevin waxed a little too enthusiastic is in his vision of how books can be linked and annotated in the library of the future. We aren’t there yet. The libraries of scanned books that are being built right now are for the most part read-only. People can link to them, but not from them. People can potentially create active reading lists, but for now, they can’t add to the works themselves. That still remains an exercise for the future, and one of the big opportunities for publishers who make that level of reader involvement with the work possible through a more open implementation, or through frameworks that provide additional layers on top of static texts.