A big plus that is still kind of yet to be realized is the increase in utility of notes taken on a device. I like to jot notes in the margins of books and papers while I'm reading, but I almost never go back and look at them. Every once in a while I'll end up searching trying to find where I wrote my note, and usually can never find it.
Recently I have started using Apple Pencil, Apple's Notes app and iBooks to read and jot down ideas. Apple's Notes app already supports searching for handwritten notes, and I hope that soon iBooks can support searching for handwritten notes in PDFs. These apps combined with Spotlight really increase the value of notes + a collection of books/papers, as it turns your device into kind of a personal database.