The Windows version was released to beta testers, but they're very slow on the rollout. They're doing what they did with the original Mac version... only accepting people 1 at a time.
I'm guessing they're going to add more to the ecosystem overall. I think they've also decided on their monetization plans (not that I would know what that is).
I'm hoping that they're planning to get in front of the Chromium MV3 debacle and maybe support more engines (or release their own).