A fundamental shift towards a new interface paradigm is happening right now. Influenced by the continuous growth in market share of smartphones and tablets, compact, specialized, and mobile-optimized user interface is becoming the trend among known websites like Google, Twitter, Pinterest and many more. This UI is called Cards.
The card user interface is both a trend and, possibly, the absolute future of web design. Web re-architecture (away from pages and links) is making it possible to personalise experiences. These are built on a collection of individual pieces of content, capitalising on the elements of mobility, and capturing just enough time of users' interest to convey needed information and give satisfaction that will ensure future visits.