You say "far more impressive", it's all the same...trade offs. Last gen we had GTA5 on WiiU level hardware.
What's to say what devs can do with 1TF+ console isn't as impressive considering 1TF+ isn't really much these days and yet you have something like Uncharted 4 or Battlefront. Is it only impressive when they do it on a weak system? But then it is all relative since PS4Bone are weak too compared to what's out there today, more powerful than WiiU sure but they also have to adhere to the higher standards expected of modern games.
I know this is my first post but I think some things should be addressed:
1. GTA5 on PS3/360 is almost a generation beyond this Zelda in terms of technical feats. I mean, I see a lot of Nintendo fans speaking of "the physics" but even GTA4 which was a 2007 game had it done much, much, much better than this Zelda, and GTAV improved a lot over that. Of course, in terms of lighting, solid framerate, textures (Zelda has to use cell shading to hide its PS2-esque texture resolution), draw distance and IA GTAV is worlds above anything Nintendo has ever tried to do. Nintendo is about gimmicks, not real videogames, and that's apparent when analysing their games from a technical view.
2. This new Zelda is a 2004 game in terms of technical merits. It can't compete even with 2006 games like Oblivion when it comes to graphics (graphics, not aesthetics. I'm aware that Nintendo puts a lot of colours here and there to give that cartoony look that a lot of people likes despite it being obsolete technically speaking), but it's good enough for a Nintendo game on the WiiU.
3. The WiiU is, in terms of hardware, a console halfway between the Xbox and the Xbox 360. Its 1999 CPU isn't even comparable to the Celeron 3 the Xbox mounted core for core, and when compared to Xbox 360's Xenon CPU, it's 3 cores can't compare to even a single core of the Xenon (not only Xenon cores are clocked much higher at 3.2 Ghz, since they're a much more modern architecture of 2005, they also perform much better when compared in a per clock basis with WiiU's 1999 tech). The console also has less than half the bandwidth of the Xbox 360 and a GPU that's at best 2/3 as powerful (160Gflops vs 230 Gflops of the Xenos). Yes, I know this is Nintendo's fault to use such an archaic technology on the WiiU, but in the other hand this proves that a 2004 looking game is good enough.
4. Of course, we're in 2016 and not in 2004, and even when taking into account the limits of the WiiU this game isn't anything special. When compared to Naughty Gods that were able to pull this in real time on a PS3: