HDX delivers a Windows Aero or Windows 8 experience to any user, regardless of the client, by rendering the graphics content on the server. Aero redirection leverages the graphics processing unit (GPU) or integrated graphics processor on Windows client devices to provide users with a fluid Windows 7 Aero or Windows 8 desktop experience.
The Windows Aero options that become available in a virtual desktop are as follows:
The taskbar preview when a user hovers over an image in the taskbar
Windows Peek when a user hovers over the preview image in the taskbar
Flip when a user presses Alt + Tab
Flip 3D when a user presses the Windows key + Alt
In XenDesktop 7.x, Citrix changed the name of the feature from Aero redirection to desktop composition redirection.