The headless BI is not a buzzword - same as headless CMS concept, the headless BI is about decoupling the analytical logic from the presentation and self-service layer. The design of headless BI is a robust system based on open and declarative APIs allowing combining the data services to a custom stack.
The data managed by DataOps teams are often consumed as analytics insights, dashboards, or machine learning models. We believe that exposing a SQL database and let your consumers analyze the data in the visualization tools of their choice is a way to hell.
Read this article that explains why headless BI is the perfect fit for DataOps teams: https://medium.com/gooddata-developers/dataops-headless-bi-the-perfect-fit-2654a923ac01
Also, you can get started right now by downloading the community edition directly from the dockerhub: https://hub.docker.com/r/gooddata/gooddata-cn-ce.