Legal Entity Identity

Most SSI initiatives are focused to improve individual user's experience, reduce friction there, and provide easy transactions. But it may well be that corporates and businesses might harvest most benefits from a mature, established, decentralised ecosystem and EAA's.
What other elements are required to make these benefits work? What are these beneifits? How to prepare for getting these benefits? How will this work, and how should we establish practical legal entity ID's to make it work?