Gamescom 2013 update:
http://www.youtube.com/watch?v=3iT13e6KYrQ&feature=youtu.be&t=2m20s"According to a rep at my demo, the Swift Sail can be acquired at the auction house after completion of the first dungeon..."
The Swift Sail can sail at any direction at MAX speed regardless of the wind direction. So pure glitchless runs are faster on TWW HD for sure.
"There’s also an enhanced first-person camera which now allows for full movement in that perspective." So you can walk around and aim in first person mode.
Five Triforce pieces can now be grabbed directly, and only the remaining three will require translated charts. - Notable drop for rupees required.
Hero mode exists as soon as you start of the game by turning it on or off on the file select screen. - Based on Skyward Sword and not OoT Master Quest.
Also no hearts drops which also means R.I.P Helmoroc King skip via Zombie Hover on Hero Mode.
"and those pictures can live on Miiverse. But Link can also take funny self-photographs" - Where is the Kreygasm face that you can take if you go OoB?
"it’s no longer possible to accidentally skip Tingle’s island, as the developers have inserted an introduction to the quirky character into the main quest."