I just found 13 pictures to compare The Legend of Zelda : Ocarina of Time on 3DS with the original version on Nintendo 64.
That's pretty cool, there is a big difference and I'm really impatient to rediscover it on 3DS !
Zelda OOT N64 vs 3DS screens comparison
I think you probably know that the Master Quest will be include with the game too. So, we just have to wait for june now ...