Thanks, I see what you mean. Although I don't think a tablet would work for me. I mean I never used an e-reader IRL but my issue is not portability of the device but reading on an lcd screen for long time strains my eyes. So I might be reading most of the material in front of a computer and using the computer in between.
Also I read the battery times are also in weeks? Although some people say it's not continuous usage. So not sure if ipad and an e-reader has similar batter times?
Other than that I agree ipad is definitely a good device.