Somehow i guess that WW HD just was 30fps because the original was 30fps.
Let's say Wind Waker is limited by the CPU (likely, because it is everything but graphically impressive). The GC had a 485MHz IBM PowerPC. Wii U has a 1,24GHz triple core PPC. even if Wind Waker uses just one core, that CPU core should manage to run more than twice as fast.
We all know though, that framerate is important to how a game feels. Having WW HD run at 30fps let's this game feel more like the original.
Edit:
@Spemanig:
Skyrim is poorly optimized? Show examples please. It likely is very well optimized for 360 actually and there really is a lot going on. About texture quality: we have somewhat shitty material from december and the E3 trailer. The latter one shows things like tons of grass and other foliage you do not see in Skyrim, at least not at the same scale.
Then we have better lighting, better LoD and other things. And it is not only the graphics but how CPU heavy Zelda U might be. If it is not empty and there's stuff comparable to Skyrim in terms of npc's and animals etc. i'd expect it to be somewhat limited by the CPU. And Nintendo is normally heading for locked framerates. If they can't achieve locked 60fps i'd expect them to go for locked 30fps.
Keep in mind that Far Cry can go below 20fps and Skyrim can go down near 20fps.
