Do your Win7 themed Windows 2008 desktops work in the same way as Windows 7

Yes.

They are the same technology and Win2008 server can be made to look, feel and operate almost identically to a Windows 7 Desktop.

Due to the licensing implications of trying to run desktops in a datacentre environment, it’s easier to use Windows Server 2008 and skin them with a Windows 7 theme.