Started as a hackathon project, Microsoft Garage has released a PowerPoint plug-in called Social Share that lets you share slides or decks from within PowerPoint to your Twitter or Facebook account.
Microsoft announced Social Share on the Microsoft blog site, The Fire Hose, on November 5, 2015.
One feature that may catch on with conferences is the ability for speakers to share a deck and then look in the social activity pane for audience comments and answer questions, all without leaving PowerPoint.
You can find out more about Social Share in the blog post, Social Share makes it easy to distribute slides and decks to more people through social networks, which first appeared on Microsoft's blog, The Fire Hose.
Thanks to Jeremy Thake for mentioning this in episode 71 of his recent podcast, Office 365 Developer Podcast