Looks like a fun toy. That can already be useful. I'm thinking of games that don't even have to leave a prototype stage, e.g. Roblox, or actually just for better prototyping. Even if it can't produce anything sufficiently good yet (depends on the game and audience, look at Minecraft), if it's fun tinker with that's enough to be useful. If it improves that will certainly be more exciting but it already looks useful.