FAR CRY DOES OPEN WORLDS BETTER?!? Are you f'ing nuts? Hell I'm so bored with driving the same roads over and over that I quit playing the game. The entire center of the map is more or less a center with 4 roads that branch out to a giant road that encircles the map. Not to mention the guard posts that are ALWAYS filled with guys who will shoot, jump in a jeep and follow you.
But honestly I think (at least for single player) the biggest use of resources is audio and AI.