Because the world didn't catch fire with the news, Microsoft has taken to their blogging network to announce a licensing change to Remote Desktop Services (RDS), allowing service providers (partners) to use RDS to offer remote connections to applications and shared desktops that are being hosted in a VM on Windows Azure.
The licensing has been updated in the Windows Azure Licensing FAQ here: Remote Desktop Services on Windows Azure
And, the Microsoft Product User Rights doc has been updated to also reflect the changes: Microsoft Product Use Rights and Product List
Note that the licensing changes are only for partners, not Enterprises. Enterprises are still restricted by what they can host in Windows Azure. Enterprises are still limited to hosting Windows Server 2012 or Windows Server 2008 R2 in Windows Azure and due to desktop licensing restrictions cannot host a client OS that supports multiple users. This should change sometime in the future, though. In May 2013, Mary Jo Foley floated a report that Microsoft is working on a Desktop-as-a-Service technology called "Mohoro." Read about that here: Microsoft readies 'Mohoro' Windows desktop as a service