I found an interesting concept device called Senso at Kontrast Blog. It is designed to help people suffering from dementia or forgetfulness. The concept is composed of three sub-modules: the Personal Lifebook, the Souffleur and the EMO Pillow.
The designer says that the EMO pillow gives haptic feedback by changing its surface structure. It reminds me of Surflex project.
Surflex is a programmable surface for the design and visualization of physical objects and spaces. It combines the different memory and elasticity states of its materials to deform and gain new shapes, providing a novel alternative for 3D fabrication and the design of physically adaptable interfaces.
Via: Kontrast Blog