Either way tethered to it is not in the fore seen future. My camera connection kit allows me to ( if I chose ) uload from camera or card to the iPad, if I need to send something along the way.. It fits into my camera bag slung over my shoulder and is barely noticeable. Much lighter than any of my notebooks or laptops, even the mini's.
I see the want and maybe the need for control of the camera with it. With the 64 gig storage (well about 50 gig as I have it loaded with bookoo photo for portfolio and about 2 gigs in apps an maybe couple cartoon or so for kids to watch) it is a good way for some to unload cards on the fly.
There are hundreds of apps for photographers, many of which are just dazzle bs, there are also many, to me greatly usable ones that help plan location shoots, what time of day the light will be where in the sky and angle. Hour by hour weather if need be and next day weather to be sure all will go well.
If the place they have in mind is not public, thanks to google and so other apps I can get the info and call ahead. That way I can see if I can bring strobes n a few this and that's or, if I need to pack light for a run an gun
I'm an ole fuddy duddy, but I can see the need to keep up. I use iPad to allow customers to pay me on, light easy credit card setup with my bank. If they want to use paypal, got that too. Need low res for facebook or tweet, pop in the jpeg card from the 1d3, or better yet grab the G9 and pose them as they'd like stick in the card, app up photogene or another, tweak it crop to needed size and as a perk, the can access there online account logon upload there pic log off all on the iPad and there happy. They've already paid for there shoot, that's just a perk at the end. It's uses are endless and almost instant on, if it's on standby it is instant on. For what it won't do mini laptop. My mini's are barely heavier, have far better wifi but, no unlimited 3G if wifi is not available. Still all that can be done on a laptop. If you have an air card in or attached to or there is wifi. Same as the iPad, for stuff such as mail, tweets, FB, iPad is faster.
CANON, if you are listening, should you decide to make an app capable of tethered control shooting in such a way that it left noinkers in the cold, your sales would increase. Get with Apple and work out a fix for us junkies and both of you will increase sales.
See I dream out loud sometime too! Well dreams that be dreamed in public anyway.
I'm not gonna dream aloud about Christie Brinkley here though.
Still for the OP , tethered shooting as it is for me, still a dream.