I recommend the video "Real-Time Databases Explained: Why Meteor, RethinkDB, Parse & Firebase Don't Scale" https://www.youtube.com/watch?v=HiQgQ88AdYo

That does not answer what differentiates your solution. I work on steaming systems. I am aware of the spectrum of online, latency aware data processing. But what I can tell from your solution is that the changes are coming from the database itself. Since, as I understand it, the database is the still the source of all data, I don’t see why your solution is any faster than continuous queries in a database.