They aren't exactly
4th Generation Kindles — they are more like a branching out from the main Kindle family into some strange branch where being able to touch the screen becomes as important as reading from it.
All of these games are compatible with the 2nd, 3rd, and
4th generation Kindles.
A major stepping stone for Amazon is selling their new
4th generation Kindles in the retail market with custom firmware for the device to read Japanese characters and give the device the ability to be localized.
Amazon first pulled this stunt last year, with
the 4th generation Kindles (and, retroactively, to the renamed Kindle Keyboard).
Kindle Touch advantages — touch - screen, more compact, lighter,
4th generation kindle, easier interface thanks to touch.
Not exact matches
This is the
4th generation of Amazon
Kindles although the 3rd
generation is still available but renamed the Kindle keyboard edition which has two models the Kindle WiFi and the Kindle 3G WiFi.