In a practical sense, though, that's not what is advertised as the appeal of advanced graphics. The push for higher graphical fidelity has also pushed game budgets way, way up and reduced the practicality of publishing riskier, more creative games.
While some games certainly do use advanced graphical capabilities to support the gameplay, those are generally the exception. A great example is Aliens vs. Predator 1999, which was among the first games (or even the first?) to have environmental lighting that could be manipulated by the player. If you were playing as an Alien, the human NPC AI couldn't detect you in darkness, and you could break many of the lights in game to impose that on the environment. Likewise, as a marine, you were blind in the dark and had no flashlight, but instead had a limited (but regenerating) supply of flares and night vision goggles. While using the goggles, however, your motion tracker was disabled. So the darkness forced you to make a choice between clear vision (night vision goggles) without the tactical support of your motion tracker or the more limited flares.
But, again, that's an exceptional case. Such games are far, far outnumbered by games that use recent graphical advances to no particular gameplay effect. RPGs are particularly notorious for this, and while additional graphical detail has helped precise aiming in FPS games in the past, I don't think we'll be seeing additional graphical quality aid that any further. Strategy games don't really need additional graphical quality for their core gameplay, either, as cool as it is to see things play out in such detail these days. And the more abstract you go, the less graphical quality really matters. I can't think of a single graphical advancement this generation that has contributed to fundamental gameplay.
I'm all for the progression of technology, but the best graphical power is going to do will be to eventually plateau. At that stage, advances in graphics technology won't be about providing more power, but increasing the efficiency of producing those graphics. This will ultimately have the effect of reducing development time and increasing the content of a game, and we might one day make it back to the amount of content we got in games from the late 90s and early 2000s.