A Tablet is not a Book, Yet

In UX Magazine:   A complaint that reading a book on a tablet is not the same as reading a physical book.  I have thought that for some time, and in general only read a book on a tablet when I need to do a quick scan, rather than a studied 'read'.  At the same time I have talked to a number of people that have effectively transitioned to reading full books on tablets.  Is it mere a matter of style, or just learning a new mode by practice?  The elements of distraction are mentioned and a challenge:  " ... what could we as hardware, system, and app designers do to help reduce distraction? And how can serious user research help us in that? ... "