What it's basically saying is "this failed until it succeeded", because the alternative option, that of being able to accurately predict the exact point the technology is 'good enough', has proven effectively impossible to do (given how so many companies that manage it occasionally also fail at it most of the time; it's a crapshoot).
To that end, given Stadia is here, does anyone think the tech is ready? No. In fact, people seem to think the opposite, that Stadia is Google's attempt to get the tech to a specific point, or to offset the cost of the tech serving another use case.
The only way Stadia has a shot is if Google stays viewing it as a way to profit from having unused GPUs sitting around within its cloud offerings.
I love new technology and gadgets. I bought an Oculus DK2 and Vive and they were both mind blowing when I first tried them, although I don’t still use them. Trying Google Glass, on the other hand, was beyond underwhelming. Holo Lens and Magic Leap, while slightly better, were also extremely underwhelming. Other than niche industrial applications, these products are far far too early for any consumer product.
I think Google is betting that cloud steaming is now viable and are going to put as much resources as possible to make it work.
I am not doubting that there are issues with the product and concerns about Google, I obviously have reservations but don't believe that it hinders me from being excited about the prospect itself