I should say that this is not my project. Nor am I a contributor — I only found it recently in my search for deploying TensorFlow models.
In terms of how this is different to other products that provides OCR as a service, object detection as a service: this is not an "as a service" product, but a framework that allows you to deploy ML models in a variety of configurations, such as Docker/K8s. I'd even say it's even further than a framework, as it's opinionated about what goes into the serving cluster: not just model workers, but query manager/load balancer, metrics aggregator and a config DB.
