The "E-Plus" World?

At John Fea's blog, meditation on whether we'll have a "print-plus" world or an "e-plus" world?  Will students expect to have all textbooks and assigned reading available in e-books or will the default be to presume as we have in the past, that such material is printed?   You can expand that to apply to government interactions, etc.--we already, I think, assume phone numbers are on websites, not in the whitepages.