I've been wondering about all the different ways they could utilize the AR technology, if it's actually coming. One possible thing I thought of is they could use the MagicBand personalization like on IASW and RnRC, and Tinker Bell spells out someone's name on the window in pixie dust, or it shows their name in fireworks over the castle, or whatever other random effect they decide to use. People might get freaked out as to how Disney knows their name, but I haven't heard anyone complain about IASW, so.
There's plenty of other things they could do with AR as well, but that was just an idea of mine.