Even though the 1.60 update for both ETS2 and ATS was released just last week, SCS is already working on features for future updates and since developers want to gather as much feedback from the community, they started an experimental beta way in advance of the actual update release, with focus on two upcoming features – the Multi-Function Display and In-Game Menu. To join the beta you should activate it in Steam. Please see details in SCS Software blog.