https://restheart.org/learn/roadmap
The new major release 4.0 is expected in early 2019 and will feature many improvements including a simpler JSON representation format, support for transactions and change streams.
Another important announcement made by SoftInstigate, the company behind RESTHeart, is about the security sub-module that was moved to the new independent, first-class project named uIAM (micro-IAM).
uIAM is an Identity and Access Manager that includes and extends the security features embedded in RESTHeart 3.x.
https://github.com/softInstigate/uiam