Some new features of vSphere 6.7
-HTML 5 Client
More features enabled such as vSAN and core storage.
-UNMAP Enhancements
Able to adjust reclaim rate. 6.5 has a rate of 25MBps. 6.7 can go to 2GBps.
-vSAN 6.7
QOS Resyncing of data.
On-Disk Format 6
-No more actual data moves or evacuation to upgrade a disk format. Going forward, it will just be meta-data upgrades.
FIPS 140-2 Encryption.