As they say, everything old is new again. The emergence of virtualization as a widely accepted computing platform has moved us that much closer to the age-old concept of centralized server-based computing that originated with the first mainframes in the 1970s. Although server virtualization has gained a sizable foothold in the Intel-based server market, the desktop market has not seen such advances. There are many reasons for this, including technology limitations that are only now being worked out, but a key one is the hostility to virtual desktop infrastructure (VDI) by Microsoft, as expressed in its Windows software license restrictions.