The social networking platform is looking to own the second screen - the conversation happening on mobile devices while people are tuned in to big events on television. Twitter has partnered with the NBA and ESPN to push instant replays of sports.

A study has confirmed that Americans spend more time on their mobile devices than they do watching TV. People in the US tend to 'stack' platforms - browse unrelated content - rather than 'mesh' - browsing related content via a second screen.

Second screens are a growing part of the TV experience. But as televisions, remotes and consoles get 'smarter', how will new user behaviours affect the balance between screens?

MTV has launched a new app which grants smartphone and tablet users on-demand access to the full range of its television shows. Importantly, it also includes a built-in feature which allows users to chat with friends online while they watch.