It's true that games will never sell for thousands of dollars or be displayed in a museum,I suppose there are definitions of "art" that video games don't fit. I doubt a video game will ever be displayed in an art gallery and sell for thousands of dollars, for instance.
Hate to correct you, but Nintendo World Championships: Gold Edition was sold in an auction for $18000, and i would argue that some collections i've seen could certainly qualify as a private museum.
Personally i don't hold any stock in Eberts declaration. Having never even played a videogame, why should anyone listen to his opinion?My opinion on whether the latest piece of avant-garde film making by Jurgen Haabermaaster was art or not would be worthless since i don't watch avant-garde films, so i'm not too bothered what Ebert rants on about.