The chess example... "They were wrong about AI never beating grand masters, they're going to be wrong about X". Well, if you make the board bigger, there won't be an AI system that can beat a human.
Play Dota 2, but introduce a random variable that can't be known beforehand by anyone, like things in the real world, and the AI will always be beatable.
Great for specific domains, obviously, but your optimism about doing more advanced stuff, perhaps doesn't seem so grounded.