“On a standard display a user must use a device to interact with the screen – like the mouse – but touch screens don’t need mice, just fingers. This means that there is no hover state to make users aware that an element can be clicked or manipulated. Also, touch devices can do more than just link, you can move, scroll, expand and pinch elements. This means that creating implied textures on elements that can be manipulated by the user is becoming more important. As users of real world, physical devices, we interact with tactile textures everyday. By replicating these tactile textures in mobile websites, the user will instantly know what sections and/or elements are able to be touched and manipulated.”

Link: The Importance of Texture in Mobile Design (tympanus.net, via)