That image is the latest patent by Amazon. Basically, it is the idea of creating a more revolutionary reading-tablet. It has dual display so both front and back will have a screen. But they are two different screens. The first one will be an LCD screen while the other one will be e-ink. Why install two different display?
The answer is simple. The front panel with LCD screen will be optimized for “watching movies, browsing, gaming and other video-demanding activities”. On the other hand, the back panel with the e-ink display will be of course for your e-books needs.
What do you think, Is it really practical to create such product?[Source]