"What are you talking about, the FF4 remake is still in 2D."

No... FFIV got a legitimate remake on the DS, and it was completely redone.
‪Final Fantasy IV DS - Gameplay - Boss#15 - Queen and King of Eblan‬‏ - YouTube

The PSP (Complete Collection) was a PORT of the original, just an overtly polished version, with sort of a, facelift, if you must. Also included was a The After Years, which was a sequel to the original, done in the same graphic style as the orignal FFs, but again polished for todays standards.