It also gets boring to watch my wife play her 20th hour of Assasin's Creed Revelations. Video games aren't good entertainment for those not holding the controller.
I'll give you an example. At a board game company, I do those too, I proposed a card game where playing the cards moved the story along, and each section of the story formed pages in a comic book format. At the end of the game you could take pictures o the "pages" and put them for others to enjoy. Then mix the cards up gain, and since the play order would be different, a slightly different story resulted. I say slightly because if it was a murder mystery a replay wouldn't make it a story about horses.
I think that games are ready for the next evolution and that will continue the killing of movies and TV.