As computers uses for education, entertaining, reading, etc.. but what you say
Can computers replace books?
Yes, Computers can replace books as they can be read both by young and old. The elderly can read e-books by increasing the font size. If the problem of connectivity and internet is solved by providing high-speed internet to everyone, downloading e-books would be much easier.
Students in most parts of Europe do not have to carry books to school. Their books are loaded in the school library website and each student is given a username and password to access the e-books. That's how I taught biology to a student in Toronto, Canada.
Yes, there are many chances that computers can replace books.