I have an ipad and am considering getting an eReader specifically for the reason of it being easier on your eyes. (although u said not to mention that point, so sorry
)
Also another point. I am trying to get away from watching so much TV and wanting to get into reading books. But me and my wife only have 1 ipad, so if we got an ereader we could read at the same time.
BTW we live abroad so getting english books is difficult. Maybe if we lived in US we would not need 2 devices.