GEODNET data is very useful for anything geo-spatial application that wants to (1) achieve location accuracy of <1m and especially if it wants to achieve of 1-10cm and (2) an application that wants a way to proof location with anonymity and autonomy.
Yes, self-driving cars is a major application area that will use GEODNET data. It is an area that 2 of the 3 project team members are actively working in every day. Also the creation of High-Definition maps both ground-based and airborne (drones) is a classic uses case for GEODNET data.