Who remembers Sun Microsystems (now Oracle) Sun Ray's [1]? I worked for Sun (UK) in 2005 and they used them for all their employees. I never understood why they didn't sell them to schools and enterprise. Maybe they tried but couldn't.

I really liked the true hot-desking. Find a desk anywhere (even another building) stick your badge into one of the thin clients and you had your entire desktop.

You could also use USB thumb drives and it would work as expected.

My manager had a Sun-ray in his house. He also used to go abroad to the other Sun offices and would just carry on with his session like nothing changed.

[1] http://en.wikipedia.org/wiki/Sun_Ray

edit: added url