Externally, the phone looks pretty interesting, but technically it can be made today. The only difficulty may cause the idea of simulating these keys on the touch screen. Some solutions to bring the feeling of the touch screen to the sensation of working with these buttons are already there. The main disadvantage of these solutions is that the user may make touch and feel the clicking confirmation one way or another. The process itself is pressing on the touch screen is not possible. It is this problem and proposes to solve the designer.
According to his plan, on top of the touch screen will be superimposed another soft layer with a liquid which, when applied to the electricity it will change its shape and form lumps in places keys. Thus, the user can feel the process of pressing as when working with these pads.