Yeah I doubt this. I don't know what exactly Google's PKI will be for but to me this seems like a close relative of Google Cloud (esp. DNS) and Google Domains. Also, similar infrastructure services from Google, like Google's public DNS resolver, show no signs of being turned down.
(Disclaimer: I am a Google employee, but I don't work on any of this.)
(Disclaimer: I am a Google employee, but I don't work on any of this.)