Citrix Systems has debuted release 7 of XenDesktop, incorporating Apache CloudStack technology. "We stepped back and asked: If we were to build this thing in the world of mobile and cloud, how would we build it?" says Citrix's Calvin Hsu. Meanwhile, Nvidia has worked with Citrix to virtualize its VGX graphics processing unit, optimizing the chip to work with XenApp and XenServer, among other Citrix products.

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