I'm surprised Nvidia didn't attempt to partner with them rather than developing GeForce Now as a separate product, they could have taken advantage of Valve's developer relationship/client/store front and handled the actual running of the hardware, which Valve seems much less interested in.

Stadia on the other hand is just a demonstration of the level of hubris Google is capable of engaging in. They thought they could launch a brand new store with the twist that people would need to pay a subscription to continue playing the games they had bought and without the option of using your own hardware should you end up purchasing a capable machine.