I don't think Zelda ever had a certain characteristic when it comes to graphics, because it has changed with almost every game.
@iHarlequin I disagree, but that's me. It would make me happier to see a Zelda game with graphics like Ocarina of Time. In fact, after I watched the "demo version" of Zelda for the Wii U, I'm hoping that's the kind of graphics Nintendo will use for their next Zelda (after Skyward Sword). I still enjoy the past Zelda games (even Wind Waker), and I look forward to Skyward Sword, but I'm hoping they won't stick to that kind of look.
@Bobmcfree The Legend of Zelda never was a gritty game. Sure, we've had Majora's Mask and even Twilight Princess, but 'gritty' never was its characteristic. Neither was mature. It's still a game about a boy who explores caves and dungeons, and Skyward Sword is looking better than any past version as far as that goes.
I'm kinda skeptical about this game. I wish the graphics/color/drawing was solid. The look kinda reminds me of Zelda: Wind Waker. I hope the Zelda for the Wii U is hard core, kinda like Ocarina of Time. Skyward Sword's environment looks empy and not very detailed. I hope I'm wrong or that at least the plot is really good and the gameplay and weapons have variety and tension.