apparently it looks like there is some conflict with the digital event on how long it will be
Nico Nico has listed for 30 minutes
http://gimmegimmegames.com/2014/06/nintendo-e3-digital-event-30-minutes-says-nico-nico/
while according to some sources it will be 90 minutes
http://www.forbes.com/sites/insertcoin/2014/06/08/where-and-when-to-watch-the-e3-2014-press-conferences/
http://staggerd.com/12724/e3-2014-press-conference-timeline
while this twitch sechudual is listening that might be at the most an hour
http://blog.twitch.tv/2014/06/twitch-broadcast-schedule-for-e3/