You know, at one point VII, VIII and IX were planned to be remade.

Final Fantasy remakes sold separately - PlayStation News at GameSpot

But, as anybody who looks at the date knows, this was when Squaresoft got a huge blow from TSW. The plans were obviously cancelled. However they did get the idea for remakes of these games once, and honestly, it's just a matter of time before they indeed do remake them.

The VII team has said to be interested in remaking VII for example, but at the moment they don't have the time (seeing as the team is spread over different games, I believe).

As for me, a remake of the PSX FFs isn't really necesary, but I'd like them portable, or at the very least IX portable. I know you can emulate them on PSP, but it's just not the same (and I don't have a PSP).

On the other hand, a full remake of IX with next-gen graphics and most of all voices could be interesting, if done properly (like keeping the cartoon style and stuff).

It's just a matter of time.