Well, I think most people read a book in one of two postures: (1) placing the book on a desk (2) sitting on a couch or bed, with legs raised, book resting on legs https://images.theconversation.com/files/361577/original/fil...

The Lisperati1000 can function in either posture. (I would argue that holding a book in front of you in the air is not a common way to read long-form books, due to arm fatigue.)