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.
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.