I think the kind of reading matter that isn't available on the internet falls into two broad categories:

1.  Copyrighted material, for which the misguided copyright holder is preventing electronic distribution.  This doesn't stop people from getting it from a public library, or scanning it to a PDF and distributing it online unauthorized.

2.  Material that is so uninteresting that no one has bothered to upload it.

I hope to get rid of all my paper books, to save a crapload of space in my apartment.

Also, offline shopping is obsolete except for heavy/perishable groceries, trying on clothes, cars, and furniture.