I think the gimmick would have to be a kind of unique rating, such as a dollar value you place on the game, or a ranked comparison to a smash hit like Ocarina of Time (though a system like that would likely be too subjective).

Actually, if properly (and not frivolously) executed, a rating based on dollar values could allow for other additions, such as an "average value of PS3 software". Of course, that would kind of be a pipedream idea because you would need both a multitude of realistic reviews as well as an exclusion of terrible titles that skew the average.

Anyways, just brainstorming.