I'm on their site and I've got to admit that it looks better than I thought.

On American FAQ:

What is the quality Stadia will stream content at?
Stadia will be able to stream games up to 4K HDR and 60 FPS quality for Stadia Pro subscribers. Non-subscribers can stream games up to 1080p and 60 FPS. Like any other Internet streaming experience, higher quality connections will result in the best experience.

How much the games are going to cost? If they want to be the netflix of gaming, they'll come for free right?
So besides the game the user will have to pay for the streaming to play the game in 4k?

New ones will likely cost the same as their retail counterparts. Not sure if you can buy the ones within the streaming catalogue. But buying games defeats the purpose of streaming, besides gamers are truly fucked if it ever closes down, Google are notorious for giving up on stuff quickly.

From what I understand the games will be priced like on the normal consoles, so expect AAA stuff to cost $60-$70. You can stream all the games you purchased from their Stadia-store "for free" at 1080p60. To stream them in full quality (4k60HDR) you need to pay the subscription and you gain additional access to certain games that are offered with "Stadia Pro" that way aswell.

It's a difficult proposition for the early adopter.

They will probably cost $60 for new AAA games. If Google was smart they would try to get devs to sell for $40 or $50.

Imo the service (for now) focusses on people that just want to be able to play certain games at very high settings, but don't have a good PC or a current gen console.

If Stadia gets mainstay franchises like CoD and FIFA with release date parity then I can see a lot of casual gamers being interested in it.

I realized something, as someone who leans conservative i have no interest in giving Google any money