If there is enough services like this, a 'cloud' service will be greatly less utilized. I don't need a cloud, but I could use this. However, do you get any of their VPN services for $6.99?
BTW, if I remember right, this was possible with a website named "iDrive" back in ~1999. Nobody back then really needed it, it was just an option so you could move your ~/napster/downloads/*.mp3's to all computers via web browser (at least that is what I used it for). Now it appears to be a welcomed service, soon to be common place.