Just my own impression after lightly reading the RFC. It appears to be the idea that something akin to Microsoft's Active Directory is needed for the Internet

Just my own impression after lightly reading the RFC. It appears to be the idea that something akin to Microsoft's Active Directory is needed for the Internet instead of it essentially being reimplemented in many different contexts. That such domains would control membership, access, and discoverability for services and applications, based on some standardized protocols.