You do know Moore's law, don't you?

http://en.wikipedia.org/wiki/Moores_law

Aside from that, the difference between one human and all of us is only 2^32 - so if you can place the intelligence of one human on a chip, you'll be able to do the same thing with all of humanity 64 years later. And that's ignoring things like reduced costs per chip / using multiple chips for the same price.