Yup. See https://gitpod.io/blog/workshops-as-code and https://ghuntley.com/anywhere

That was already the case a long time ago. We have now reached the stage where individual applications running in the browser can be an OS on their own – VS Code itself is a very good example.

You should talk to Suhail Doshi.

https://www.mightyapp.com/

More like a virtual machine. The javascript virtual machine.