Sony has stated in a support article that Ustream support will be discontinued on PS4 and Live from PlayStation apps on August 1 2016.
Users will no longer be able to live stream to Ustream and view Ustream broadcasts on the Live from PlayStation app on PS4, PS Vita and the PlayStation app.
Players will still be able to use Twitch, YouTube and Dailymotion to live stream and watch content.
Ustream was one of the services integrated with the PS4 when it first came out. Over time, Sony added YouTube and Dailymotion support. Many people used Ustream to stream content from The Playroom due to Twitch taking down content that are not related to gaming.
What do you think about this guys?
Source: PlayStation Support