This is a common concern with this form factor, but I think there's a lot of variability between people on how comfortable they are with a "book reading" posture, such as required by a cyberdeck. It will work for some people, not so much for other people.
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.)
It comes from cyberpunk literature, where a "deck" is whatever portable device someone uses to access cyberspace/hack stuff/..., and has recently become somewhat of a catchall for DIY/customized/unusual "cool" portable computing devices that don't fit in the common laptop/tablet/... categories.
