Armed with laptops and smartphones, audiences are no longer sitting still at conferences like SXSW - instead theyre using Twitter and social media to create a backchannel and start their own conversations while the presenter is talking. Is this a good thing? Or a does it spell the end of presentations?...

Armed with laptops and smartphones, audiences are no longer sitting still at conferences like SXSW - instead theyre using Twitter and social media to create a backchannel and start their own conversations while the presenter is talking. Is this a good thing? Or a does it spell the end of presentations?...