I recently read an intersting article by Thomas Berger, an Architect within the Citrix Worldwide Consulting Solutions Team. In the article Thomas shows how organizations are deploying applications to the virtual desktop using the design benchmarks within the Desktop Transformation Accelerator. As the Accelerator has over 8.500 projects registered, it is one of the most extensive information repositories on desktop transformation projects and is able to provide the following chart in the article.
From the graphic it is clear that the most popular delivery approach is to install some applications locally (on the virtual desktop) and have some applications hosted (on XenApp). Reasons why this approach is so popular are that some organizations decide to use XenDesktop just for demanding users such as software developers or engineers. The common applications are published via XenApp and the user-specific applications for the demanding users are installed on the virtual desktop.
To learn more and to read the entire article at its source, please refer to the following page, Application delivery to virtual desktops- Cliff Davies.com