I've beaten FFXIII 3 times now with wildly different parties. Had a blast with each playthrough, and really began to realize how many incredible segments this game goes through. Lake Bresha, palompolum, the air fortress, the ark, Oerba, and Eden are probably my favorites parts of the game. The sheer variety and scale of them all is really admirable. Game isn't perfect, but it's certainly special.
And I think people who were introduced to FF on this game will be coming out of the wood work in a few years (many already have). I think they'll have a greater appreciation for what this game did right, and a proper understanding of what it got wrong (some terrible enemy placements early on, for example). Same thing happened with XII, which now has a pretty strong following after being considered an abomination at release.
Hell, even X-2 is widely agreed upon to be pretty decent nowadays. Everyone seems to go through a temporary shock of hate with FF releases.