are you thinking about a functionality to create a FeatureService out of a GeoEvent Definition? I think it could be very useful if you create a GeoEvent Definition "automatically" from a GeoEvent send to an input and afterwards create a FeatureService of this Definition for example with a hosted AGP-Server.
Thank you for the good suggestion. A while back, the Esri St. Louis regional office developed a GP Tool (Python script) that creates a Feature Service from a GeoEvent Definition that we have been using internally within Esri. We are working with the creator of this tool to get it posted as a sample on the GeoEvent Processor gallery. We will post an update to this thread when in becomes available.
Hope this is helpful, Adam Mollenkopf ArcGIS GeoEvent Processor for Server - Product Lead