An Event Track is a new feature of XPression Clips, which allows for RossTalk events and other items to be added to an XPression Clips asset. Imagine an XPression Clip being able to trigger the switcher to properly wipe from A-bus to B-Bus at exactly the right frame, every time. Now, imagine that you create an INcoder Watch Folder for Switcher Wipe Clips which can automatically add that event trigger into any clip ingested using that Watch Folder.
Well, stop imagining, and start doing… That feature is included in XPression INcoder version 9.5 and higher.