Alex Pettitt announced it on the twitter. The feature powered by the Periscope. Which will let you record and share 360 view video from your mobile.
Here is the Change-log of the Update:
My research team downloaded this update on Nexus 6P and found below feature.
New Improved Live streaming feature: Twitter's live streaming feature is working very good in the Nexus 6P as we found lots of bug in the previous version.
360 Video Stream Feature: We caught the 360 video streaming feature after installing the update.
Click below to Download the APK File of this update: