If you have a look at this page:
Allow user interaction when installing applications as system
Was introduced in the 1711 Technical preview but still listed as a new feature in Technical Preview 1712. This gives us the possibility to allow users to interact with an application deployed to System and set to run “Whether or not a user is logged in or not”. A question I got on Twitter when tweeting the picture is if the application can be added to a Task Sequence when that setting is used and the answer is YES.
I wonder if this will allow us to get around the ‘Session 0’ issue when deploying as system instead of using the ‘hacky’ ways that are required now.