Ebert HATED Transformers 2 and 3. Very funny reviews.
I think what complicates videogames as art is the way games are consumed. If the viewer could edit, rearrange, and change Citizen Kane to their own liking, would it still be art?
Do some games have artistic merit in how they look? Yes. In the stories they tell? VERY rarely. Games have never made me cry or tear up, while many movies and books have.
Even the best game stories wouldn't rate as movies or books (see any MGS, GOW (either one), FF, or whatever.
Have we had a Citizen Kane, Godfather, Chinatown, or any other masterpiece that truly says something worthwhile about the human condition? Not yet. I don't even think we have had a Birth of a Nation yet. Games with interesting stories often rely too much on other media like film, television, or books.
Games like Braid and Journey do show that we are getting there, but we aren't there yet.
It is early days yet.