Thin Clients

Hi,

I'm wondering what roles are required to roll out thin clients company wide.

Currently running Windows Server 2008 r2 Enterprise, with Hyper-V role.

Provided I have the Desktop OS licenses, and enough resources available on the host server, I can create any number of desktop VMs on the server, correct? Do I require any roles other than Hyper-V enabled? Is there a limit to the amount of VMs that can be accessed at once (not multiple people to 1 VM, they'll be 1:1, one person to one VM - but is there a maximum amount of people allowed to connect to the server's Desktop VMs at once)?

Thanks,

Jason