I went back and defeated Ganon's Castle and Ganon and couldn't tell too much of a difference in the textures there. The flames in the rooms with the big orange balls you have to shoot at the end of each Medallion Room were redone. The beams of power supplying the forcefield around the entrance...
Yeah I've got it. I seldom use it though. It was more of a first time, check out sorta deal for me. I may actually go back and explore some more areas to see what else they changed. But yeah, the Kokiri Forest looks boss.