They were dabbling a bit with Project Loon and Google Fiber. A Starlink partnership gives them more reach with less capital. Not sure I would see enough value from shaving a few ms off an already long round trip to space and back to really move workloads to GCP just for one ISP.

Starlink will be great for underserved rural areas but just the difference between WiFi and a wired connection in my house makes me think terrestrial wired last mile distribution isn't going anywhere.