I have to wonder if the eye-strain issue is a bit over-stated. Many of us sit in front of back-lit computer screens all day and read stuff off them without getting a headache. In the course of work day, we probably read the equivalent of half a novel and don’t think twice about it. But I don’t read novels on a computer screen, maybe because to do so would remind me too much of work. It’ll be interesting to see if one of the Ipad’s chief features–you can sit in an easy chair and hold it in your hand–will change the psychology of what you read on it. The economics of the publishing industry are going to drive books and magazines away from paper into digital files, just as mp3 files pulled music away from cd’s.