Uh...if you're talking about view the HDMI output in real time, I doubt it. Not unless someone can be an adapter to read HDMI and feed it into the iPad for it to decode and display. Not sure if it has the horsepower to do that or not, but with it's upgraded graphics, perhaps.
As for the SD card to load into the iPad, sure, quite likely. If you shoot RAW, you'll need an iPad application that can read them though. You might find this ArsTechnica
article to be of interest.
In terms of using it as a remote (e.g. tethered shooting via USB cable), not sure, it'd have to use the Canon SDK which I don't think is compiled for ARM, but if someone were to reverse engineer the protocol, possible I suppose. I think someone has an Android app that can do some control of a MagicLantern firmware camera, so possible I suppose. It would have to be a physical cable though, or maybe it'd work over WiFi with the Canon WiFi adapter.