Some of the reorganized specs include a Domains layer of partitioning for massive NVMe over Fabrics appliances, new system for handling multiple command sets, additional groundwork for the upcoming Computational storage command set, Protection Information support for 32-bit and 64-bit CRCs, new security feature called Command Group Control and explicit support for hard drives.
https://www.notebookcheck.net/NVMe-2-0-specs-are-now-available.543058.0.html