Is there any latest technology which will replace Docker, Kubernetes in future?
Perhaps serverless could substitute it, but it will be hard to predict. I would suggest to follow industry standards and run things using these tools in production to stay up to date. The most changes in all branches occur in IT. Having said this, every engineer has to learn new things everyday to stay up to date. Whether k8s and docker will be replaced? Probably yes, but on the other hand there are still VMs and on-premise hardware. Perhaps k8s and docker will be used less in the future, but when I do not know. I am not a fortune teller with a crystal ball.