Amazon Kindle ebook readers did used to be fairly static. Designed for just reading books, they had a few button controls. They were not back lit, which meant that they were suitable for using outside, unlike tablets which are difficult to see when the sun shines on the screen. They had black and white screens and cope manage basic pictures. However, they were limited in what they could do with just a 3G internet connection which was designed just to be used for downloading kindle books.
The newer versions of Kindle have become rather more sophisticated though. Not only do they have touch screens, but the new Kindle Fire versions are also have coloured screens and can cope with sophisticated pictures. The Kindle Fire HD has surround sound, dual antenna for dual band Wi-F which makes downloading very fast. As well as being able to download ebooks, it is also able to download other apps such as games, magazines and other apps. It is even suitable for watching films and has free skype to skype calls courtesy of the front facing camera. There is even unlimited cloud storage for your Amazon content.
Undoubtedly this is the best of the Kindle touchpads if you want to have more functions than just reading ebooks. However, the Kindle 3G does have free 3G access and so free book downloads so if you just want an ebook reader, this cheaper option could be better.
One drawback of the Amazon Kindle readers is that the case that they need are expensive. For a basic reader that is not backlit, you need a lamp to read it in the dark. Some cases come with these included, but it is an additional expense to add on the the cost of the reader. The cases are due to be released in the UK on the 25th October.