Link's Hideaway has recently posted their initial impressions for Ocarina of Time 3D. Here is a small excerpt:
The 3D effects add another dimension to the game. This makes running through Hyrule more realistic. I turned off the 3D completely in order to get a good comparison and all I can say is that there is no comparison. The game was obviously designed to look and feel better with the 3D turned on. It is truly a sight to see for sure. One last note about the 3D is to watch out for the leaves falling off the Deku Tree because they just might hit you in the face.