Hi
Some features that are only available via vCenter e.g.:
- Cloning a VM
- Creating a VM Template
- Storage vMotion (if you have multiple storage/datastores)
- Single Sign-On (with AD or LDAP)
- vSphere Web Client
- Update Manager
- etc
VMware vCenter Server, Virtualization Management Software Features
VMware KB: New features in VMware vSphere 5.5
But yes vCenter would be more useful when you have multiple hosts to manage and vCenter requires a license.
If you don't have any vCenter license, you can download and try an evaluation license see and decide after evaluating vCenter.
Bayu Wibowo | VCIX6-DCV/NV
Author of VMware NSX Cookbook http://bit.ly/NSXCookbook
https://github.com/bayupw/PowerNSX-Scripts
https://nz.linkedin.com/in/bayupw | twitter @bayupw