As far as I can tell they already have. She looks better than the 64 version, the fairy fountain itself will look much better too. those star like lights that scroll across the walls will most likely be affected by the 3D so that it looks like some lights are flush with the wall while other lights will dance in the background seemingly further behind the rooms boundaries. I'm more interested in how the room will look but I guess the fairies hair will get more definition, her many sharp points (ex. nose) are more rounded now and I'm sure there is a host of other minor details that have been changed or added. The magical light that engulfs Link when you get a new power should even look better. Each time we find a Great Fairy Fountain I'm sure it'll seem a lot cooler then on the 64, I feel like they are now trying to play up the great fairies in Zelda, perhaps because of the new partner in SS, she could be a young great fairy. That's just speculation though on my part.