On the Laravel News site there's a post talking about a feature coming in the 5.3 version of the Laravel framework - Laravel Echo (not a separate system, just an enhancement inside the framework).

Laravel Echo is coming to Laravel 5.3 and is designed to be an improvement over the current event broadcasting system. [...] In this video, Taylor steps through the features by demoing a little to do app. You can see the full source code to the demo on GitHub.

Echo is essentially an improvement on the in-application messaging to provide more real-time feedback between users in the system. In his demo, he makes use of the Vue.js framework heavily and custom broadcasters and Pusher.