I think Windows 7 does support virtual desktop. Now even Windows 8 and the latest Mac OX 10.8 (aka Mountain Lion) also support HVD.
Nice to see this "answers" section. Indeed a great resource on cloud and virtualization. There is no doubt that hosted virtual desktop are hot. And organizations are using HVDs to keep infrastructure costs low, increase internal management control of its IT
systems, and support productivity from anywhere.
Also, Microsoft recently released a Case-Study of an Asset Management Firm Uses Hosted Desktop Solution to Reduce IT Budget by 50 Percent. And the benefits are not only limited to Cost savings, but customers also recorded an increased workforce productivity,
enhanced IT control, and greater operational flexibility.
Read this case-study:
http://www.microsoft.com/casestudies/Case\_Study\_Detail.aspx?CaseStudyID=710000001352