I dont think this is windows on the go like traditional portable OS, if i were a betting man this is more like a roaming profile on steroids, imagine working on an application, you need to show a college in another building something, you have to save all your documents, shutdown windows, go to his machine, copy all the documents start up the applications open the documents, it's a damn hassle, i had an idea a while back that it be nice if you could just save the state of your current work space go to another machine and deploy that workspace, now tie that into networked storage devices. You could almost eliminate the idea of employees having ownership of hardware assets
it makes for some interesting scenarios