Sorry, but I'll pass
Security, privacy, space, these are the things that concern me the most. I don't need a roaming profile, I have a roaming PC for that. I don't like the idea that someone somewhere can "index" my files so that they could, possibly, at a later date of course, be searchable in a search engine, very scary. And what about space??? Can I have 1TB+ of storage so that I can access my "home videos" on the go??? Oh and how long will it take to stream those said videos through either normal or mobile broadband? I'm going to need at least a gigabit connection to the internet.
No thank you, I'll pass.