Funny thing is that, aside the placeholders, the game looked the same between E3 2014 and TGA: there were no effects missing. The only difference was that at E3 2014, the footage they showed was a small fraction, basically a "cutscene" (especially after the monster started chasing Link) prepared ad hoc for the event. This also allowed them to use that "cinematic" cut, so everything looked perfect. On the TGA demo, they were running around in a world that was FAR from being complete, and there was a ton of placeholder content, so they had to show it off-screen. But there is no way they show something offscreen and full of placeholders now, at ~8 months from going gold, so it's impossible that it looks like the TGA demo. Aonuma said that the game would look better than the reveal so it's more likely that it looks better than that famous screen, except for the IQ (we know that the game won't run at 1080p downsampled from 1440p, right?).