The breathtaking footage Nintendo showed today for its 2015 Wii U Zelda is real, a Nintendo rep tells me. I asked if it was pre-rendered. No, they said. It's in-engine. It's not a gameplay angle, for the most part, but what you saw is coming from Wii U-level hardware, it seems.
The shot above is a high-quality screen of the new Zelda provided by Nintendo. Click the top left corner to enlarge it. Enjoy.