It's been stated my numerous people that "Nintendo always go for 60fps", THIS IS NOT ALWAYS TRUE.
Zelda games are usually NOT 60fps, even when other Nintendo games on the same hardware were, this holds true all the way back to at least N64 days. Nintendo will do what they feel is best for this particular game, for them it's all a matter of priorities.
Not much more than 6 months ago people were saying we would never see 1080p60fps on the WiiU aside from 2D Indy titles. Then we got Smash Bros, because Sakurai felt that resolution impacted gameplay when the screen was zoomed out. Luckily we also got 60fps, but that clearly was at the expense of shader/effects use, which we can see if we compare Smash to Nintendo's other recent first party efforts.
I think it's possible that we will get 1080p30fps if Nintendo decides that image quality/distance visibility has an important impact on the gameplay, but how often is this likely to be an issue?
I think it's possible we will get 720p60fps if Nintendo feels it has a significant impact on the fluidity of the combat in the game, but how much combat is there going to be in the game?
I think it's possible that we could get 1080p60fps if Nintendo wanted to but given the level of visual fidelity displayed so far (compared with Smash for example), I honestly don't think that is the direction they are taking.
I think it's most likely that we will see 720p30fps because I feel with Zelda Nintendo is most likely to prioritise the creation of a rich, seamless, continuous world with little to no loading times, above all else.