Unlimited ammo is an absolutely horrible idea. Then again, I guess it wouldn't matter much anyway. In games like TWW and TP, I found arrows and bombs quite easily by ways of enemies or pots and all that. I almost never ran out of arrows or bombs. In Ocarina of Time and Majora's Mask(especially Majora's Mask, because of the 3 days limit) I found myself having to go to a shop to buy bombs and arrows quite a few times, and I even had to leave dungeons for them at times. So, as I said, unlimited ammo is a horrible idea. If anything, they should make it harder to get it.
Of course this whole unlimited ammo thing is more than likely just a beta element and we won't see it in the final game.