On their weekly Podcast. Stadiacast has said that a developer has told them that generation 2 of Stadia is in testing for developers. The developer who wishes to remain anonymous said to them some devs have access to gen 2 hardware and have had for a couple of weeks. It was also stated that developers can also request access to generation 2 of Stadia.
An interesting quote from the show was
Gen2 runs our games better than Xbox Series X
Please watch and support the full show on Stadiacast.
We will have more on this when we have it.