Ebert argues that unlike movies, video games can never really be considered works of art.
That's what I always liked about his reviews, I could depend on them. If he gave a movie two thumbs up I knew it was going to be a bore, and two thumbs down meant it was probably science fiction and/or really rocked. Ans yes, I wholeheartedly disagree with him about video games, too. They're not all art of course, but I've seen some that certainly are.
Charles Broussard disagrees with me on this, we had some interesting online conversations about this a little over a decade ago. Michelangelo didn't consider himself an artist, either.