My understanding reading it is that it’s implementing something more like SolidJS (which is also a no-VDOM reactive library which looks a lot like React) and Qwik (which also serializes/resumes from state in the DOM), but built into the core compiler rather than as a separate library/JSX transform. I doubt it’ll make React obsolete, especially as React expands in scope (e.g. Server Components), but it might be a good replacement for a lot of use cases. It’s certainly got my attention!