My organization would like to leverage our GIS data with Tableau's BI visualization product. Tableau cannot currently read spatial information through a live connection of our sql server SDE, only through flat files. But they do have a feature called Web Data Connectors (WDC) which allows API's to get data via REST for charting purposes. If ESRI created a WDC, it'd combine two giant communities of data professionals.
Info:
Web Data Connector
Space: Web Data Connector |Tableau Community
GitHub - CORaleigh/arcgis-web-data-connector