Video blogging (vlogging). People don't want to type anymore, it's all about video updates. A lot of companies failed trying to offer a platform for video updates years ago (wrong timing). Thanks to Youtube, in 2017 it's the perfect year for that, look at instagram/snapchat stories. They shutdown vine which I think was the future of twitter. They should have replaced the 140 characters by a 15s video.
Twitter, if you're looking to hire someone to drive this switch, contact me.