I'm no businessman, but I would gladly buy a new-age Final Fantasy with beautiful Sprite graphics, or 'toned down' 3D graphics, as long as the story/mechanics captured the magic present in some of the older (and not so older) games.

I didn't mind Final Fantasy XIII all that much, but it was (in my mind) the weakest of the games from VI forward. The graphics were indeed very beautiful, but for the nostalgic in me, I'd like to believe that many people would enjoy playing an FF game with simple graphics, so long as it captured the magic and ridiculousness of some of the previous installments.