I play a lot of open (non-linear) RPG games on my PC and these can tax a system as much as any FPS due to all the textures and lighting.
i.e. Bethesda games like Oblivion and Dragon Age come to mind.
I would like to see games grouped (and listed in smaller print) into classes, like those that tax CPUs heavily, those that are very heavy on shader use, etc.
I would like a corresponding list of games within that group. For example, "Games heavy on shaders".
Some cards do a lot better for AA than others as well, and some games require more AA to look good than others. If there's some way to group these types of things for us it would be highly beneficial when we are making selections on what to purchase or play with our computers.
Will a 256mb card work for a game like Oblivion? Probably not. But that's really what gamers need to know. Is their system in need of a better video card, CPU, or more memory? Or is the whole thing too slow to realistic work with a game/application.
The same thing could be done for games that require a fast CPU. Some modern games will still run on a 2.0ghz Athlon 64. It would be beneficial and save us money if we are a looking for games that we can still play on our systems without having to upgrade.