A while back I was asked by a friend about my Kindle. I think it is a great device. I enjoy reading books on it, surprising enjoy the New York Times and Wall Street Journal on it, and found Amazon did a great job with the bookstore. I bought it because I simply wasn't reading enough books. I found myself always distracted by the endless supply of content available online. I was reading, but something is always missing if you don't pick up a good book now and then. The almost singular focus of the Kindle as a device is exactly what the doctor order for me. I read more books in 2009, then 2008 only because of the Kindle (nice work Amazon).
So when I get an iPad (notice I did say when), will I retire the Kindle?
I don't think so. I think as a book reading device, for me, the iPad may have offer too many distractions. With the Kindle in my hands, I'll stay focused on the task at hand. That said, I do hope Amazon will make a iPad specific Kindle app as I'd love the opportunity to stay sync'd if the iPad happens to be with me when the Kindle is at home.
Time will tell, but I suspect for some a dedicated ebook reader makes sense. The iPad is going to be too much for some people.