Cluster Security VPC

[perryqh]

https://aws.amazon.com/blogs/big-data/a-zero-administration-amazon-redshift-database-loader/ mentions

In order to load a cluster, we’ll have to enable AWS Lambda to connect. To do this, we must enable the cluster security group to allow access from the public internet. In the future, AWS Lambda will support presenting the service as though it was inside your own VPC.

When can we expect "presenting the service as though it was inside your own VPC"?