VMware announced on January 25th that App Volumes, formerly Cloud Volumes, has been added to the Horizon View Enterprise Licencing bundle.

VMware App Volumes provides real-time application delivery to end-users and desktops. IT can use App Volumes to instantly deliver applications and data to users without compromising user experience. Infrastructure and management costs are reduced by utilizing managed volumes. Unlike traditional application management solutions, App Volumes allows IT to deliver a desktop with no trade-off between user experience and costs. 

For a quick overview of VMware App Volumes see this video from VMware.

Benefits of using App Volumes: 

• IT can deliver or upgrade application workloads within seconds. Provisioning applications is as easy as simply installing them once. 
• App Volumes also helps to deliver great user experience while driving down storage and management costs. With App Volumes, end users can take advantage of fully customized desktops and enjoy the ability to install their own applications and have them persist across sessions. 
• IT can drive down compute, network, and storage costs by leveraging on-demand layering and the non-persistent architecture that App Volumes helps to enable. App Volumes virtual disks can be placed on any supported VMware vSphere datastore, enabling IT to leverage the most appropriate storage including fast storage with high read IOPS such as VMware Virtual SAN instead of needing to stream application across the network from a CIFS shares
  
• VMware App Volumes can be leveraged by physical desktops.
• For Non-VMware VDI environments you can utilize App Volumes on Citrix XenDesktop, XenApp and RDSH.

VMware introduced replication in vSphere 5.5. The biggest limitation is that it only provides a single restore point only. This is an immediate show stopper for most customers. Multiple restore points are absolutely essential, because just like "good" data, any corruption/virus/dataloss from the source VM is immediately replicated to target VM, and if you don't spot the problem and perform failover to replica fast enough (before the next replication cycle) - which is going to be impossible in most cases - then you are done.

Careful consideration needs to be given to the underlying virtualization platform as well as to the supporting infrastructure which includes network considerations.

VDI deployments benefit from having more than one connection server to provide high availability. Many organizations use Application Delivery Controllers (ADCs) to help balance the load across the multiple connection servers in their environment. ADCs also provide a number of other capabilities such as access control, SSO, and protocol proxy.

See the F5 and Horizon reference architecture here: http://www.slideshare.net/PeterSilva1/preso-16503raavailvdi-record