Good article thats sums up the advantages of using Sun Ray Thin Clients and VMware Virtualisation.

Low Cost | Low Power | No desktop administration unlike Microsoft windows.

For me the best thing about using SunRAY thin clients is that I can take my desktop with me anywhere in the world and is SILENT.  No humming like a Windows Box.  

A SunRAY Thin Client the same as on my desk here in the Sun Gordon office in Sydney.

More about SunRAY Thin Clients here.