Heard on TV channels this weekend on the impact or non-impact of social media: Sam Pitroda in an interview on Doordarshan: “Social media is going to be the new mainstream media of the future..newspapers are a dying breed". A social media enthusiast on NDTV: "you don't have credibility if you don't have a Twitter account... “ Since when did social media take over from mainstream media? And since when did Twitter become the test of credibility?