Stayed up to watch. 3DS and PS4, seems similar to the Ni no Kuni release with DS and PS3.
The 3DS version looks much further along, I'm guessing they decided to make a PS4 version later on. PS4 version looks hot hot hot. 3DS version looks like a cleaner DQIX and the bottom screen is 16-bit 2D. Very cool.
Also DQX is coming to PS4.