That screenshot kind of gave this away, as it was pretty obvious, but I'm actually happy it's confirmed.
I'm more interested in how exactly this will work, it will certainly work in the favour of nonlinearity, which I've wanted for a while and it looks like we're getting such a game. I'm guessing that these items will be rather expensive, but I hope it's not just a case of grind and grind, as even though you are essentially striving to get more rupees, it's tedious to say the least.
That being said, rupees should not be handed to us, I would love to see Nintendo make it much harder to earn currency, that means no respawning chests and significant rupees, less rupees in the overworld and no place were one can grind easily - as in many games there were a lot of places were one could grind.
Instead of grinding, I'd like to see side quests gift rupees, games like Fallout and Skyrim do such and it works as money actually means quite a deal in those games. This could put more emphasis on side quests and exploration as whole. This game is starting to look very good, I just wish people wouldn't underestimate it so much.