I recently got the new Kindle Paperwhite for a relative. Before I handed it over, I had the chance to use it for a few days. It uses a touch based interface on an e-paper display. However, there are no buttons and the interface is navigated entirely using the touch screen. After I handed the Kindle over, I also got a chance to go hands-on with an older variant. This used buttons for navigation. After using both, I felt like I should juxtapose both these experiences and talk about what in my opinion would be the ideal user experience when it comes to interacting with e-readers.
Feedback and Reliability
One handed use
Side mounted buttons to turn pages on the old Kindle make it easier to use it with one hand. Having to tap the screen with one hand while holding the device in the other hinders and in many cases completely eliminates one handed usability. As this blog post says, one handed usability allows one free hand to eat popcorn or chips without leaving grease on the screen, for example.
On the flipside
Buttons do have disadvantages though. They might add to the overall expense of the device. As they are physical objects, they are subject to wear and tear over time. They also add to the overall bulk of the device and may be undesirable for people who value sleekness of the design over ease of use.
The best of both worlds
With the exclusively touch based interface of the new Kindle, Amazon seems to have decided to go button-free for the future. There is a way where both approaches can coexist. Amazon could include Bluetooth connectivity with the next Kindle. This opens up the possibilities of connecting keyboards and other devices to the Kindle and allow the users to use a button based navigation over the touch screen. A Bluetooth enabled case that adds the side mounted page turn buttons would be a great idea. Allowing the user to choose their preferred way of interacting with the device would be the best pro-consumer way to make sure Amazon can retain their sleek button-free design without un-solving a problem that was solved by the buttons in the first place.