He has some good points but completely loses me at the end. He's basically echoing Miyamoto's philosophy of emphasising fun gameplay over presentation. This includes graphics but also everything that detracts from the game. Metal Gear, if you look closely, is pseudo-intellectual pretentious garbage dressed up as a solemn social commentary. The funniest part about the game comes in realising that Kojima actually thinks he's being insightful. I don't think I'll ever support style over substance in a game, unless it really blows me away (like Eternal Darkness).
But this argument falls apart when 1) he insults Nintendo's Wii games and 2) he names Dragon Quest X of all games as the one to bridge the gap between hardcore and casual gamers. Both these points are shattered by the existence of Mario Galaxy which is "steeped in the traditional vocabulary of video games, but with broad appeal" more than any other current gen game.