The cynic in me wants to argue that all post-SNES 2D Zelda games are in fact remakes of LttP :) I mean that as a good thing.

I haven't had a chance to really play Tunic yet, but I just get the feeling that calling it a Zelda clone is unfairly reductive to both. If Tunic and Okami are both Zelda clones, but not clones of each other, something needs reevaulation.