This looks to be a "Private Preview" feature (not GA'd yet) and I am guessing that someone at your org opted into. 

The cloud infra cost system table helps you see all your data workload costs in one place using Databricks. This includes two main types of costs:

1. DBU costs from Databricks
2. Compute costs from your cloud provider (right now, only AWS)

Hope this helps.

Thanks for replying. This makes sense. Any idea why it is empty and what to do to populate this?

It is possible that the feature is not enabled so there is no data collection,

Any idea when this feature will be in public preview?

I do not at this time. Louis.

You can also take a look at this built-in cost control dashboard explained in the below video or official databricks documentation at https://docs.databricks.com/aws/en/admin/usage/ . Concerning the dashboard, relevant subject for me was you can inspect all the underlying system tables by accessing to que internal data model and queries.