Earlier quoted context omitted.
Check out Fast.com. If your loaded latency numbers are high, it's possible you won't do well with Stadia. The best test is going to be using it. There are too many factors to have a good predictive test.
Last mile times are always going to cause lag. 5g won't be rolled out for years, then you'll need a phone to take advantage of it so that's not going to help. Last mile in US performance is really poor unless you're on full fiber which isn't offered in most of the US. Even with direct peering to the ISPs, which they don't have, this isn't likely to be a superior experience compared to a local machine. They'll have to…
Can't directly refute this, but wouldn't you think GCP is peered with the vast majority of local ISPs (in America and maybe the EU)?