There is one single SKU for RHEV that includes server and desktop virtualization.

Red Hats Enterprise Virtualization includes an integrated connection broker as well as the ability to manage VDI users via external (LDAP-based) directory services. The same interface is used to manage both server and desktop images (unlike most other solutions like e.g. VMware View, Citrix XenDesktop).
Please note that VDI is an additional charge to the server product and cannot be purchased separately (i.e. without purchasing RHEV for servers).
Red Hat Enterprise Virtualization for Desktops (RHEV-D) consists of:
- Red Hat Hypervisor
- Red Hat Enterprise Virtualization Manager (RHEV-M) as centralized management console with management tools that administrators can use to create, monitor, and maintain their virtual desktops (same interface as for server management)
- SPICE (Simple Protocol for Independent Computing Environments) - remote rendering protocol. There is initial support for the SPICE-HTML5 console client is offered as a technology preview. This feature allows users to connect to a SPICE console from their browser using the SPICE-HTML5 client.
- Integrated connection broker-a web-based portal from which end-users can log into their virtual desktops

Note: VDI related capabilities are NOT listed as Fee-Based Add-Ons (no purchase of additional VDI management software is required or licenses involved to enable the VDI management capability).
However, you will require relevant client access licensing to run virtual machines with Windows OSs, see http://bit.ly/1cBdgAm for details