I think @shawnbass made a very important comment. It's not the OS but the license costs that will make cloud solutuons favor Linux distro's! I see more and more linux based OS use cases at customers these days.
@antonvanpelt Only problem I can see with giving the user a choice is that the user might end up confused... autonomous feature is needed in the future... auto adapts...
I'm with @ervik that user's love to choice functionality, not the technical implementation, that should be transparent or auto adaptive to make a success!
@VMWare hasn't bought #PCoIP, #Blast is their own protocol. I can see the line in the horizon where they are going but only the future adoption will dictate. I feel for all those buying Zero Clients.