In the August 3rd, 2009 edition of the New Yorker, Nicholson Baker has an article A New Page Can the Kindle really improve on the book?
He covers the pros and cons of electronic reading, focusing on the Kindle. He makes some interesting digressions into the history of the development of the technology. He talks about some of the alternative readers that are available.
I find nothing to contradict my working assumption that electronic-readers are an occassionally useful supplement to reading but will neither replace or even displace real reading.