Now that Citrix has announced the new "XenApp" name, a lot of people are wondering why this book is still called "Presentation Server 4.5," and indeed whether PS 4.5 has a future?
The short answer is that as long as there is Windows Server 2003, there will be Presentation Server 4.5. The future versions of Presentation Server, beginning with Project "Delaware," will be Windows Server 2008 only. These are the versions that are being renamed to "XenApp."
If you want to use Presentation Server on Windows Server 2003, then PS 4.5 is your product. In fact, Citrix even plans to continue to develop new features for PS 4.5, with plans for Feature Pack 2 and Feature Pack 3 in the 2008 / 2009 timeframes .
So yes, eventually you will move to XenApp. But that will only happen as you move off of Windows Server 2003. In other words:
|OS||Citrix Product Family|
|Windows Server 2003||Presentation Server 4.5|
|Windows Server 2008||XenApp|
As time moves on, this will become very confusing, because Citrix is planning to use the "XenApp" branding in all marketing and sales efforts. But the product that this book is about, Citrix Presentation Server 4.5, will continue to be called "Citrix Presentation Server 4.5" even as it's updated with Feature Packs throughout 2008 and 2009.
If you're interested in learning about XenApp and ultimately migrating to XenApp in your environment, then you're in luck! XenApp and Presentation Server 4.5 are basically the same product, just each built for a different underlying platform.