Well, for starters iTV requires content stored on a computer and so isn't really a box for receiving free-to-air or subscription TV. We don't know the final specs, but I doubt this will change.
Given a choice, I'd contact sky and ask if I could cancel my subscription, move down to just FreeSat and still record those channels with sky+. If so, thumbs up. If not, it's either lowering the package or still ditching the lot and buying a hard disk recorder with twin freeview tuner.
Either way, unless they substantially change iTV, or your friend isn't after something with a tuner and HDD in, it's probably an easy choice.