Well, once you get to a certain point in the game, near the end, you find out that you're not real and are in fact a simulation on a massive computer. Hence the relevance. This part of the wiki explains it a little bit:
Reaching the Time Gate, the party enters "4D space," a dimension higher than their own. According to the 4D beings, their universe is actually not real in relation to 4D space; rather, it is a computer simulation developed by Luther Lansfeld, the owner of the Sphere Company. Dubbed the "Eternal Sphere", it is similar to a real-world massively multiplayer online game for the inhabitants of 4D space.
Anyway, I guess I should have elaborated more, but wanted to see if anyone else would get the reference. It's explained a lot more in some detail in the game and it's really well worth a play as the story is up there with the FF series.