[c4h8o3del]

The issues with batteries can be mostly, though not entirely, averted with e-readers, which use html (epub is just a zip with some xml metadata).

Now books, easily copied?

When's the last time you tried to share a copy of a book with a friend? Or did you buy a blank and copy it by hand? While that's a laudable example of dedication it's not exactly easy nor convenient.

Cheapness is likewise debatable, printing out a 300-pages book is fairly expensive.

Most other concerns are concerns only if you use broken-by-design sources.