How long until computers have the same power as the human brain?

Here's a sobering thought: most insects have five ganglia or so. That's their whole nervous system. With that amount of processing power they manage to do vision, navigation of complex environments, and a range of tasks unavailable to computers like predation and avoidance of predation, mating and avoiding mortal danger from adverse environmental conditions.

Five ganglia. In terms of the article's overdone analogy (lake what?) that's barely a teacup.

And still we haven't managed to put together a machine that can function in the world with the autonomy and the success of an insect.

So, you know, don't be surprised if you wake up forty years from now and wonder "where's my AI" in the same way that we wonder about our jetpacks today. Hype is easy. AI Is hard.

How do you measure the power of the human brain? In some instances on some problems computers out perform humans. For example, searching the Internet or multiply large numbers. How would you test a computer to determine if it had the "same power as a human brain"?