I have seen somewhere (might have been in a Databricks Tech Talk) a Delta Table feature which allows to specify the "expiration date" of data stored in Delta Tables. Once rows surpass their time-to-live, they are automatically deleted or archived. 

Does anyone know if such a feature is already out there or if it is currently in development?

Unfortunately, I cannot find the tech talk, doc or blog post where I saw this but I am sure I saw it somewhere :D...