I wouldn't be surprised to see DO either roll out DaaS next or partner with someone (Compose.io?) to do it. That's one of two things (the other being VPC, which I know they're working on per HN posts elsewhere) that make AWS/GCP tempting over DO for me.

That said, I kind of hope it's not Compose.io - they seem ridiculously overpriced for PostgreSQL compared to AWS's and GCP's offerings.