NFS storage appliances often offer advantages over normal NFS storage solutions. This can range from simple manageability improvements to storage deduplication and various snapshot and backup technologies. Replication is often a capability of NFS storage appliances, which will allow you to survive site failures.
NFS vendors can offer de-duplications, which reduce the storage requirements even further. Deduplication finds duplicate patterns in the VMDK files and reduces the number of copies physically stored. Deduplication is very useful when combined with VMware Horizon View. View full-provisioned desktops can be deduplicated with a high degree of storage reduction as much as 75 percent. View thin-provisioned won't see as high a reduction ratio, since the base image is only stored once. However, with careful planning, deduplication can allow you to hit higher consolidation ratios of both virtual servers and desktops.