Another plus for ereaders is the ability to search through whatever you are reading, and it is easy to bookmark passages you might want to return to.
Also, although this will probably not pertain to the young, my old eyes find it easier to read text on an ereader than a book. Plus you can change the font if your eyes are getting tired.
Fantasy? What type of fantasy? If it’s anything remotely similar to Dragonlance, you may have a new reader! :]