I'm willing to make the video on it ... Only not sure when I can get to that. The image review on iPad is sufficient even with the magnification required to 2x since its a native iPhone app only at this time. You can zoom in to the photo BEFORE you take it, and ensure focus is accurate just as with live view.
It would be ideal to have a native iPad app... But in my use of the remote feature over the past week since I've had my 6D, it hasn't hindered me to believing a shot was in focus due to resolution on my iPad only to find out later on a laptop that it was in fact soft.
And to top that all off, I've been using this iPad WiFi feature with my TS-E 17 f/4L which is a manual focus only lens. Check the "6D owners unite,.." thread and you'll see my images that I've posted. They're also on my Flickr, and I've tried to be as descriptive as I can with regard to which shots were taken using the remote feature, and of course you can check the EXIF data to see which lens I may have been using for a particular shot.