I feel like this is pretty non sequitur. He seems to imply that above some magic number of transistors intelligence will simply manifest itself. Intelligence is more than just computational power.
There's no telling really. It also depends on how you define intelligence. It doesn't necessarily have to be (explicitly simulated) human intelligence.
(Mind that intelligence in humans wasn't created on demand either. It arose as an emergent property of the mammalian brain, due to evolutionary pressures)