The 3DS version looks brilliant and dastardly with it's nostalgia mining. I know the PS4 version is way early, but the 3DS version just looks a lot better to me at the moment.
The announcement of an NX is rather huge, depending on how privy Square Enix is to what the NX is. The PS4 version of DQ XI is running on Unreal Engine 4, so this means that the NX is or will support Unreal Engine 4. Also, this gives hope that the horsepower of the NX is comparable to the PlayStation 4. Lastly, this erases any doubt that the NX isn't a dedicated home console.
Or does it? The NX version could be an upgraded 3DS version which will give a nod to the "NX is the hybrid" camp.
Ah, this raises more questions than answers!