Yahoo chose Kik over Messenger to launch their new bots. Facebook keeps pushing hard for Messenger, and they are even disabling the mobile web app.
Apple finally opened up Siri for developers.
Also, they made a move into messaging with iMessage. Instead of a bot API like Messenger or Kik, or HTML mini web apps like WeChat, they are releasing an SDK to create mini apps that live on conversations on iOS devices, together with a new App Store. I didn't see that coming, really.
On the Google front, I believe it's just a matter of time for Google to release an SDK for Google Now.
Ah, in case you missed it, here's a summary of the KPCB Internet trends 2016 presentation.