I've always hated this argument. Games to me are so much more than art. Take a screenshot in Just Cause 2 while on a high precipice, and it looks like it could be a painting of a beautiful island vista - THAT is art. Call games art if you must, but I think the debate ends up selling games short in the end.
“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” - Mahatma Gandhi