Right, but only the Kindle devices can read the books. Not a PC.
Having read a few books a my laptop in the old days, I can say that is not an issue. Since the Sony I would not even consider the eyestrain inducing read on any LCD or CRT device. So in that respect the Kindle is a bit better.
You could buy your whole family Kindles for XMas and they could all share their books, even if they live in another part of the world (assuming they have internet).
OK, now we will all be deluged with European folks who want us to buy them, send them, and share books. <g>