So, to be clear: it’s not a concept like Nomadic Identity. Rather, it’s a demonstration of importing data archives from other social networks and platforms, and integrating that data into an existing Fediverse account.
In other words: it’s not a singular managed identity for all your apps, it’s a mechanism for marrying data from different systems to a Fediverse Actor. Paired with something like Nomadic Identity, it would be a game changer.