These days, each project is a project for multiple screens. Multiscreen has become digital reality and requires a continuous information flow, a central hub for contents and a system for the definition of user interface (UI) elements. Content and user interface should basically be independent, but there's a correlation. Content and user interfaces can be built and planned modularly and structured according to a similar pattern - comparable to the bricks in a building block system.
You can find more information on that topic in the book "Multiscreen UX Design": http://www.msxbook.com/enbook