Woooohoooo, looking forward to getting a PS4 now. We need to see some pics to see how much better it'll look!
Given that the latter was a remake of a DS game, I'm not surprised (for reference, the N64 could've outperformed the DS).
I don't actually think that's it. I looked through a lot of pics of the DS version and I really think it's because they changed the camera angle but left the environments the same. They were designed to be looked at from above whereas when you get a sweeping shot across a whole town, they just look kinda unnaturally designed. Like a set of buildings have just been dropped into segments next to each other. Some DS games were designed for those kinds of wide-open views and would look fine in this kind of remake, Lufia: Curse of the Sinistrals comes to mind.
So I guess that half-contradicts my claim that they've lost skill in their artwork. But that's the impression I got from looking through the DS pics.