I don't think you got my point about interactivity and video games. Video games are not art due to their interactivity. They're not art because they're emotionally stunted and incapable of doing little else except being entertainment BECAUSE they have to be interactive and engaging and "fun". When you have games that limit interactivity in place of cutscenes and story, you have really bad games. So it's either make a story-based game with shit gameplay or make a game that has an emphasis on "fun" and little else, especially not story. This means there is a limitation within the medium.
We drew a parallel to sports earlier in this thread, but I've never known video games to tear down racial, social, and country walls that impede progress like sports have. Video games have offered humanity very little despite being 40 years old. Sure, they're special to us, but due to the very confines of the medium, it limits the range of people who can be involved in it by default, and that's just one of the major points against video games; art should and always be something hands on, that all people can access and weigh in their opinion, and due to the very basic principles of video games - controls, mainly - someone who has never played them WILL struggle playing something like fucking Mass Effect. Whoops! But ANYONE who isn't blind can go to a movie and watch the latest Scorsese film. Notice that diff? That said, while I don't think games are an artistic medium, I do think there some games can be considered art, but they are exceptions and not the rule.