He Can Fly!

Some of Harry's magical abilities are mentioned in earlier books and not seen again. One of those abilities is introduced on page 25 of Harry Potter and the Sorcerer's Stone. Without even knowing he's done it, Harry avoids being captured by Dudley & crew by flying - and if not flying, then what? Harry is being chased on the ground and ends up on the top of the school building. Now, it is widely known that Harry is a good flyer - but always on a broom. Could it be that Harry has the ability to fly without the aid of magical items? Is this special power going to appear in the final book?