I think this is a good move from Twitter and Periscope. Periscope hasn't quite yet reached its potential but this could be a game changer. 

Accessibility and availability are both so important on such a fast paced social media platform and to be able to simply scroll through your news feed and come across a live video stream is exciting! 

As a result, we may well see a lot more seminars / presentations taking place on Periscope in the professional services industry. At the moment this is only available on the iOS app but let's hope they roll it out to all other devices shortly.