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Datastore can be created in multi-region configurations. This is deployed over multiple regions in a single continent/nearby geographic areas, e.g. USA, Europe, and Asia. Google Cloud Storage has the same features.

We have a series of locations that determine replication topology, but you cannot do à la carte region selection at this time. Under the hood we run on at least 3 independent private super fast network fabrics between regions, so we have a pretty high bar infrastructure wise for deployments. We bet on having reliable high-grade deployments and Google's world wide network to get requests to users faster rather than stretching out arbitrary deployments. Seems to work so far for customers like Snap & Niantic Labs (Pokemon GO), but YMMV.

For Cloud Datastore, looks like you choose a region to run in:

https://cloud.google.com/datastore/docs/locations

(Not sure about the rest.)