This is just a unofficial demo of a Microsoft PowerPoint template in the style of Power BI. I basically just adapted the font, and the colors (which I found here, thank you David Eldersveld:

https://dataveld.wordpress.com/2016/02/13/microsoft-power-bi-color-reference/)

Download the template here: powerbistyle.potx. This template is just a product of playing around with fonts and colors in PowerPoint.