I do the same (inverting colors) on my 4" smartphone and page-turning is more often than with a book but it doesn't annoy me at all. And I can hold a very light

I do the same (inverting colors) on my 4" smartphone and page-turning is more often than with a book but it doesn't annoy me at all. And I can hold a very light device with one hand lying on the side or reading in the subway. You misunderstood me, of course you don't have to hold or carry the iPad while reading but at least you have to keep it in balance while it lies or stands on something and after a while I prefer lighter devices—just try a Kindle, this much lighter weight makes a huges difference! And, where's the advantage having a bigger screen when reading normal literature (with programming books I prefer the iPad because you need space for code examples etc. but then again I prefer the notebook over the iPad because the IDE is close ...)