The new Power BI Designer is a dedicated report authoring tool for the Power BI Preview service. It offers rich data transformation and visual analytics in a unified, seamless experience. In this session we will look in detail into some of the features for the Power BI designer and take it for a spin and investigating some of the new capabilities it has to offer for different relationships and new DAX formulas. 
Presented by Kasper de Jonge at SQLBits XIV