Google has overnight announced all of the details for Stadia.
Google Stadia will release on November 14th in 14 countries. Australia isn’t one of them. The countries are: Belgium, Finland, Canada, Denmark, France, Germany, Ireland, Italy, The Netherlands, Norway, Spain, Sweden, the UK and the US.
It’ll cost $9.99 USD a month in order to access the service, but this will only be for older games. For newer games on release, you’ll still need to pay a fee to stream them, which seems a little odd.