To make a great game is as much talent and creativity as making a great movie, album, or painting. To say that some can't be considered art just because they aren't that good, or made to make money is the same as saying a song can't be art just because it sucks. Regardless of the quality, they're still art. If anything, I think video games would take more creative talent to bring all of the art elements together to form a cohesive whole than many other artistic mediums.