ok, but Search aside (which is Google's primary product; we were talking about side project), many of these are also-rans; they didn't really change the landscape the way Google Maps (and of course Search). OK, maybe Android, but that wasn't developed by Google. Neither was YouTube (groundbreaking), or Waze (not groundbreaking).

The only one I would take from your list would be Kubernetes and Google Earth, and Kubernetes being more of a dev tool would really count as far as impact and usefulness to society (Go would fit there).

Google Books _could_ have been great, but Google didn't take care of it. Same with Google Reader.