Coming from a GamesTM interview with Eiji Aonuma...
“We encountered an awful lot of problems from the drastic leap we took with Wind Waker. I think we will be a bit more careful in the future, but if we find a new approach that not just the developers, but also the users would enjoy then I think we will want to break new ground again. But we haven’t found such an approach yet.”
Obviously, we know that gameplay will always come first for Nintendo. With that said, I'd really love to see Zelda make a drastic choice with visuals again. I loved Skyward Sword's look, but I think it's time to really take a big leap.