For what it's worth, I am already familiar with this design space well enough that I don't need this kind of example in order to understand it. I've worked with Kinesis and other streaming systems before. But for people who haven't, an example might help.

What kind of business problem would someone have that causes them to turn to your service? What are the alternative solutions they might consider and how do those compare to yours? That's the kind of info they're asking for. You might benefit from pitching this such that people will understand it who have never considered streaming solutions before and don't understand the benefits. Pitch it to people who don't even realize they need this.