I don't know enough to make an informed decision. My gut feeling is "Oh noes, it's teh Zelda gimmick!!1", but who knows, it could turn out to be something deep. If traversing terrain is the full extent of this new ability, then yes, I believe it's a mere gimmick to separate it from other Zelda games. That said, if you're able to do other interesting stuff like draw to interact with the terrain (draw different types of bombs for different effects, for instance) or mess with paintings before entering them, it could be a very deep, well-used mechanic. I'd love to see Nintendo make full use of it, but I don't know enough about it to proclaim yea or nay. I do know it looks a little too corny and goofy for my tastes; The Wind Waker had a lighthearted appearance and atmosphere, but it still knew how to be insightful and epic. I don't know how this is going to turn out, and I can't imagine it looks terribly heroic battling the great evil as some Crayola-inspired child's drawing on the wall. Nevertheless, I'll wait to see what comes of it before denouncing it completely.