I see a huge potential for an IFTTT or Microsoft Flow Connector or Trigger.
Trigger: I have been part of a company that runs a great amount of Microsoft Flows to automate business processes. It would have been a nice addition, if we could start a Alteryx process when a certain event happens.
Output: On the other side, it would also be good to start a flow automatically when an Alteryx workflow is finished. E.g. it would be possible to create an analysis and automatically push it to several media / internal channels. It's also possible to bring twitter/facebook/etc output connectors to Alteryx, but it's definitely easier to build an IFTTT connector, that enable a huge amount of other tools.