One thing I always run into when talking about VMWare ThinAppp/VMWare View vs. Citrix XenApp/Citrix XenDesktop is that people are set on going one way or the other.  When in reality, ThinApp and XenApp are very complimentary products.  ThinApp can simplify your application deployment and the management of those applications.  Whether that be to traditional desktops, virtual desktops or application delivery platforms.  XenApp can simplify your deployment model with the Citrix Desktop and published applications.

However, Publishing ThinApps to Citrix Desktops or delivering as published applications can extend those management efficiencies.  You can have a single source of management for all applications in your environment and deliver to all devices/locations as well.  You can continue to reap the rewards of a Thin operating system and the packaged application mobility/reliability while also increasing your ability to deliver it to more end user devices in more geographical locations. 

Lots of reasons why a ThinApp deployment delivered via Citrix XenApp is a desirable solution.  Just another way (and a good one at that) to simplify management and increase application performance.

Remember the goal.  Any Device, Anywhere!