Its called a SmartKeyboard and a group of people are working on it, so it will not be like many other concepts that never turn into reality and always remain in pictures. Besides a keyboard, it also doubles as a stand. When you will snap on the cover the screen squeezes to show the display in the part of the screen which is un-covered (not covered by the SmartKeyboard).
Here’s a video showing this not-yet-released-concept in action:
Via: [Source1, Source2]
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