Ultimately, the purpose of human intelligence is nothing more than ensuring our genes continue reproducing. It's just an accident that we ended up so much smarter than our survival really required. As soon as we got smart enough to recognize intelligence as a desirable trait, things got out of hand. But all this processing ability that we have is still tied to the job of ensuring our genes continue reproducing. Computers can be free from those design restraints. They can be upgraded much more quickly and easily than biological systems, even with genetic engineering.

The future is technological, not biological. We'll invent AGI soon, and that will be the last thing we ever invent.