Well for my 2 cents, i could sit down and play through FF7 right now, in about a week. I cant because my games so old it doesnt play through the rocket explosion, it freezes but thats besides the point. The reason i bring this up is because of what someone said before, the game would need more than graphics to be worth while. Now, if they did put more in, it would be awsome, but the game and graphics alone is enough for me to buy a ps3 and that game.
Even though ive beaten the original many times.
Graphics and maybe voice acting would probably do it for me. I'm probably not wanting a lot to change because I want it to stay sort of the same. Maybe a few added sidequests or something or more limits for Cait Sith and doing a lot more with the 2 secret characters (i.e. Make them permanent or add in a lot of additional scenes to support them, but I think permanent would probably work better.)