When you want to run all the things.
That’s the Tacx Tablet holder with the DIY phone holder. Phone running Companion App, iPad running ZwiftGPS to show position on map, and an AppleTV driving the 32" TV.
This was a fun config for big events or particularly long rides. I also had a tab open on the iPad for ZwiftMap.com which I will never not put a plug in for - super easy tool for visualizing routes and seeing what you’ve got coming up for sprints and KOMs.