WebAssembly(WASM) has the potential to provide a more lightweight and secure execution environment than traditional containers, which could be beneficial for applications that require high performance and security. However, it is still relatively early in its development cycle, and it is unclear how much traction it will gain in the future.
Cloud native is an approach to building and running applications that exploits the advantages of the cloud computing delivery model. In simple terms, Cloud native applications are built using cloud-based technologies, fully hosted and managed in the cloud.
Dockers and containers are the building blocks for Cloud native development. Docker enables developers to build, run and ship applications that can be virtually run on any Operating System (OS). A running instance of a docker is called Container.