Sadly, it doesn't matter what's in the demo, there will be threats and tweets and articles rating because:
If the demo looks as good as the render: Why the demo is not in the eShop, Nintendo?
If the demos dons't look as good: We knew it! Is garbage! Worst Zelda ever!
If the impression are good: Why is this coming out in the WiiU? You and your stupid decisions!
If the impressions are not that good: Another IP to the garbage! Go third party already!
If none of the demos is the NX: This game would be soooo much better but Nintendo is stupid, not buying until the NX is $100 AND come with the game.
If one of the demos is in the NX and the NX version is "enhanced": The WiiU version is a waste of time and is dragging down the NX version! Worst company ever!
If one of the demos is in the NX and both versions are practically the same: The NX is so weak it can't even run the U version of Zelda! Nintendo doooooomed!
And I bet there will be some screenshot of some low-poly element, like a bug or a bird, and then a part of the community will flip their minds because "it takes away the realism"...
Anyway, really excited about this, I will definitively watch all of it. I have to play a Zelda game I dislike (CD-i not counting since I don't know where I could find the games or the console , other than emulation).