As a left-handed gamer, I am hoping this isn't true. Between the more lackluster recent additions to the handheld systems (for the most part anyways, and I'm not talking about any ports), making Legend of Zelda require motion controls just isn't smart. Hell, god forbid someone might not have full use of their appendages and is a major fan of the zelda games, then they'd never be able to play again.
Then of course, there is all the issues we've seen before. Imprecise tracking, interference from other sources (remember that was a major issue when the game was revealed, though I guess that was fixed, unsure), and it just doesn't translate all that well with some mechanics.