Not exactly, because this example from Deno is using Preact, a stripped down React-like framework. Server Components relies on React fiber and the latest async features in newest version of React. They do both aim to limit the JS sent down the wire though.
[0] https://nextjs.org/blog/layouts-rfc [1] https://reactjs.org/blog/2020/12/21/data-fetching-with-react...