Daaaang. Super good looking so far. Although, I make it a rule to never get hyped over concept art ever since Epic Mickey. This is harder to do, considering Monolithsoft is so good at what they do. The Zelda team went to them for help. That's a big confidence booster, right there.
If they wanna compete with Western RPGs, presentation is key, which is what they lack. No more bad looking character designs, and things have to feel, at least, somewhat realistic. No weird Xenoblade jumping physics, and things have to connect. Combat doesn't have to be good, judging by other WRPGs.
I'm kind of hoping they break some of those conventions, however. Japanese devs do some of their best when they try to emulate the west, but consciously fix the flaws western devs are too afraid to poke holes at. BoTW, MGS, and Souls are all excellent, because of this, IMO. I'm interested to see what direction they go in.