I would like to be able to query the tables, columns, DAX calculations (columns and measures), and data source queries for datasets published to PowerBI.com. This would allow me to determine if I have many similar models that could be combined, or if I have multiple models defining the "same metric" differently. Having this information would help manage usage of space in Power BI and provide information for organizations to see where they are perhaps in need of master data management (or simply conversations about data definitions). If we could combine this metadata with usage information (which datasets are used, what columns are used), that could be powerful from an administrative perspective.