So. Who will buy it?
Corporate users: well, not many would want to have that much data floating about that's isolated from the backup strategy. No dice.
Home users: Great! I can turn off that wireless thing on my laptop and backup my machine to this! Providing I don't mind connecting it to the mains first of course. Oh - and staying within 30 feet of it (assuming the odd wall and so on: 15 feet - or roughly the same distance a decent USB2 / Firewire cable can manage).
Until they can squirt the power to it the same way as they do the data, this device remains rather pointless. When they do get the power to it wirelessly and they start selling like hot cakes, I'll be in line for my very own metal-lined hat.
