I get where you're coming from, but go to Stadia's page. Click "Buy Now". You land at $130 plus $10/month with no other options. This isn't a future product or preorder, this is launch. The hardware and service are live right now. If you want to play: $130 plus $10/month.

I think this release structure is pretty daring. They're getting a lot of bad press, it's expensive, it's not a smooth experience. Also, if nobody gets on this holiday season, I'd expect game developers to throttle on putting money into optimizing for the platform, which would begin the platform death spiral.