Yeah I think that article is intentionally misleading.
Quote:"In this example we have a couple of stream analytics queries. One aggregates age into an age range and passes in other fields such as location to PowerBI, and the other is the query mentioned above. PowerBI lets you easily create a variety of visualizations including maps, line charts, tree view charts and more. Charts get updated in real time as data is generated by users uploading pictures at http://how-old.net. "
Note that where it says "Charts get updated in real time" it neglects to mention that maps do not. So far, I do not see anything that allows me to do this.