While social networking sites already help users maintain connections with friends and interest groups, a recent trend in web services has been the growth of semantic technologies that connect people across different websites. New York startup AdaptiveBlue offer a service called "Glue," which uses semantic web techniques to understand the content of popular web pages that describe lifestyle objects such as books, music, and movies. It then lets you do many useful, in-context things based on that data, such as learn more about the movie or actors on IMDB, buy the soundtrack on Amazon, read the historical background on Wikipedia, and a interact with a variety of other sites and services.
In theory the rise of software-defined networking is supposed to give rise to a new class of applications that will give developers more control over, for example, location-based services. In actual practice no one is quite certain how developer will invoke SDN capabilities, but the folks at Hewlett-Packard are anxious to find out.