I wonder if having multiple tablets so that we didn't have to switch apps so much to take notes would render paper obsolete. Where does the assumption that we

I wonder if having multiple tablets so that we didn't have to switch apps so much to take notes would render paper obsolete. Where does the assumption that we mostly use paper to take "notes" from things we read in other computer media come from? Imagine a student with three tablets open side by side, one in a note app, one in a textbook app and a third one for other apps. And why not imagine just one tablet with note-taking integrated or a way to switch between apps momentarily? It's not like you don't already divert your eyes and attention from the physical book to the paper you take notes in in order to take a note. So, why have two tablets? Also why the third tablet? If the student is studying some textbook and keeping notes, why would he have other apps open? So he could destroy his attention span?