Sorry, but I don't think that's true at all. What kinds of games do you play? Ever played a strategy game before? I'm not talking about Civilization or Starcraft either. I'm talking about Europa Universalis, Victoria, or even Alpha Centauri. These are games that consist of in-depth warfare, trade, economy, and diplomacy, typically involving very tight strategy on both micro and macro levels.
I'll be damned if any of those titles don't give me more intellectual stimulation than a game of chess.
Again, this is an outright falsehood. So... you've never played a thought-provoking video game before? Again I have to ask, what types of games do you play then? Some of my most profound and thought-provoking moments have come from video games (and movies as well... I don't want to imply that either entertainment medium is superior to the other, which seems to be what you're doing).
Some titles I can think of off the top of my head are The Witcher, STALKER, Bioshock, and Indigo Prophecy. Typically they are games with very well-written storylines and narratives. Sometimes they involve making complex moral decisions with no clear consequences. (Games like Dragon Age and Mass Effect don't count; their "moral decisions" are usually just "Hey thur, I'm Commondor Shophord, I can choose to be good, neutral, or evil, herp derp.")
That's part of what I love about video games though. As an interactive medium, it's more diverse than any other form of entertainment. You have you're mindless shoot-em-ups, and your simple puzzle games, all the way down to your intricate RPGs and sci-fi epics with some in-depth commentary about the human condition.
30 years ago you would've had a point. Nowadays, current technology gives us video games that are equally as intelligent and thought-provoking as what movies are capable of.
It sounds like you're unaware of many of the games we have out today. Either that, or you're an old man who refuses to accept that video games have reached the same quality as movies, all while telling kids to get off your lawn.