The article is wrong about the Kindle. The iPad will have little effect on Kindle sales because it is so cheap, the battery lasts for weeks, it is light and works in more environments like outdoors/sunlight where the iPad is useless and too expensive to take to the beach.
some of us don’t read outside, strangely enough. We play golf, swim, garden, walk our dogs, mow the lawn, or wash the car.
reading on the beach? nope, we read in bed at night instead of watching the tube, and appreciate the iPad for reading in the dark so we don’t disturb our spouses.
to each his own...
I have a Kindle and I hate it. The books are WAY too expensive. It only does one thing (you can read books on it---WOW!!), but does not do it better than a real book. It is the most worthless device I own. I can't wait for an iPad....