Kubernetes and TensorFlow should count, and are successful.
AlloyDB is IMO most likely to be successful (especially since AWS Aurora already proved the market):
https://cloud.google.com/alloydb
Since this question seems to be much more about the consumer side, I think both Google Home and YouTube TV are independently considered successful though I have no doubt many people will chime in to note how much they hate either or both of those things.
Kubernetes and TensorFlow should count, and are successful.
AlloyDB is IMO most likely to be successful (especially since AWS Aurora already proved the market): https://cloud.google.com/alloydb
Since this question seems to be much more about the consumer side, I think both Google Home and YouTube TV are independently considered successful though I have no doubt many people will chime in to note how much they hate either or both of those things.