A couple of tools are moving in that direction, but oddly enough, it's mostly deeper analytics tools like Hex.
The obvious player that should do this and hasn't is Google. They have Looker, they have BigQuery (and Stackdriver, and Cloudsql...), they have Slides, but apparently they don't have the desire to put them all together. Meanwhile, Microsoft does have this kind of integration between PowerBI/PowerPoint, but they're locked in to their own ecosystem.
Basically, it seemed like something that someone should be doing (and we originally started from the BI tool side, like you were thinking) but nobody is, so we decided to go ahead and throw our hat in the ring.
BI tools haven't been going in this direction. They are moving towards helping you understand your data or embed your dashboards. It's a lot of focus on understanding and monitoring, but not communicating or storytelling. That is where we want to step in.
The obvious player that should do this and hasn't is Google. They have Looker, they have BigQuery (and Stackdriver, and Cloudsql...), they have Slides, but apparently they don't have the desire to put them all together. Meanwhile, Microsoft does have this kind of integration between PowerBI/PowerPoint, but they're locked in to their own ecosystem.
Basically, it seemed like something that someone should be doing (and we originally started from the BI tool side, like you were thinking) but nobody is, so we decided to go ahead and throw our hat in the ring.