Microsoft has already pulled some features in order to keep WSV's ship date on track.
XenSource also develops management tools for monitoring collections of virtual servers, while Microsoft's forthcoming Virtual Machine Manager will not support WSV in the first release.
And Windows users are not strangers to the Xen-based virtualization environment.
Last week at the LinuxWorld Conference, Simon Crosby, XenSource CTO, said 90% of the company's customers for its open source Xen hypervisor are Windows-only.
He also described the Xen hypervisor as just an engine that requires others to build parts around it just as XenSource has done with its commercial XenServer and XenEnterprise software.
"Xen is likely to fulfill a similar role as Meta Frame in its early days, providing Microsoft with an immediate solution, but one where [Citrix] can stay heavily involved in product development and benefit directly from sales of Windows on Xen, while [WSV] development progresses," Jefferies analysts Katherine Egbert, Jordan Roberts and Eric Bukovinsky wrote in their report.
Jefferies is not alone in its assessment as last week Credit Suisse also theorized on a Citrix acquisition of virtualization technology with an eye on the desktop.
The company cited recent public comments by Citrix "that virtualization and systems management are areas of potential interest for acquisition."
The Credit Suisse report said one of the developers of commercial virtualization platforms based on open-source Xen (XenSource or Virtual Iron) "could represent an attractive target for Citrix."
The report cites the fact that Citrix already has two of the three components to support virtual desktops. The two are its virtualization technologies for the presentation and application layers of the desktop. The third, a hypervisor and virtual infrastructure management tools, is only provided via partnerships.
"We believe that hypervisor and associated management solutions would be complementary to Citrix's long-term strategy of offering scalable application and desktop delivery," the report concluded.