If carrying a larger device is no problem, consider holding a heavier device while reading for a long period of time. (turbofuture.com)
This attribute mimics traditional ink and paper, and users of E Ink displays have said that they do not have the same eye fatigue as with LCDs when reading for long periods of time. (goodereader.com)
If she is able to sit and listen for longer periods as a reader, she will have the skills necessary to sustain her own reading for longer periods of time, which is imperative during the elementary school years. (scholastic.com)