Remains to be seen, imho. Of course I'm talking about casual games with light 2d sprites/images.

Check out this: https://codesandbox.io/embed/react-three-fiber-untitled-game...

Or some of the other demos here: https://github.com/react-spring/react-three-fiber

React lends extremely well to games, especially with hooks. Now you have reactive components, but also algebraic effects.

React is not procedural. React is declarative. React is a way to turn imperative APIs into declarative APIs that are much easier to reason about. So yes, this is a big deal in my opinion.

Many games are also a procedural method of UI rendering. Think about puzzle games, or even tetris. From a high level they're just complicated buttons. Of course it wouldn't be a good fit for anything that is highly interactive or 3d.